Trademark clearance first pass — knockout + similar-marks check producing a flag list, not a clearance opinion. Use when a new mark is proposed, when asked whether a mark is available or to run a knockout search, or when assessing likelihood-of-confusion factors before a full professional search. This skill never concludes a mark is clear.
Install with Codex or Claude Copy this prompt, paste it into Codex, Claude, or another assistant, and let it review the skill page and install it for you.
A direct command skips the review prompt. Inspect the source before running it.
Trademark clearance first pass — knockout + similar-marks check producing a flag list, not a clearance opinion. Use when a new mark is proposed, when asked whether a mark is available or to run a knockout search, or when assessing likelihood-of-confusion factors before a full professional search. This skill never concludes a mark is clear.
Codex v1 local-input note: This migrated skill supports local files and pasted text by default. References to Drive, CLM IDs, Slack, Westlaw, iManage, Ironclad, eDiscovery, dockets, or other remote systems require a separately configured Codex connector/MCP server. When a connector is unavailable, ask for a local export, local file path, or pasted excerpts. If config/local/codex-for-legal/<practice>/CLAUDE.md is missing, ask the user to run the relevant cold-start-interview or customize skill and copy from config/templates/codex-for-legal/<practice>/CLAUDE.md.
$ip-legal:clearance
This is a triage, not a clearance opinion. A trademark clearance opinion
requires a full professional search and registered trademark counsel's
judgment. A "no obvious conflicts" result means the triage
didn't find anything — it does not mean the mark is clear. Clients have been
sued over marks that passed a knockout search.
Instructions
Read config/local/codex-for-legal/ip-legal/CLAUDE.md. If it
contains [PLACEHOLDER], stop and direct to $ip-legal:cold-start-interview.
Follow the workflow below.
Run intake (mark, goods/services, classes, jurisdictions, visual/stylization).
Similar-marks search against what's connected (Solve Intelligence, CourtListener (connector optional; not enabled in v1), Descrybe (connector optional; not enabled in v1), or whatever MCP is available). If nothing is
connected, say so in the output and proceed with the factor analysis only.
Walk the applicable circuit's likelihood-of-confusion factors — du Pont /
Polaroid / Sleekcraft / other. Flag each; never conclude.
Write the triage memo to the matter folder (if a matter is active) or the
practice outputs folder. Apply the work-product header per role.
End with recommended next steps and the non-lawyer gate if the role is
non-lawyer.
This skill never concludes a mark is clear. If uncertain, flag — the attorney
decides.
Examples
$ip-legal:clearance "APEXLEAF for an outdoor apparel line, planned launch US + EU"
$ip-legal:clearance
(And the skill will ask for the mark, goods, classes, and jurisdictions.)
THIS IS A FIRST PASS, NOT A CLEARANCE OPINION
Say this at the top of every output. Do not drop it. Do not soften it.
This is a first pass, not a clearance opinion. A trademark clearance opinion
requires a full professional search (TESS, state registries, common law sources,
international registries, domain and social, trade dress and design marks where
relevant) and attorney judgment on likelihood of confusion, which depends on
factors a structured triage cannot fully assess. A "no obvious conflicts" result
from this skill means the triage didn't find anything — it does not mean the
mark is clear. Clients have been sued over marks that passed a knockout search.
A registered trademark attorney evaluates before anyone adopts, files, or
invests in this mark.
This is the loudest guardrail in the plugin. Under-calling a conflict is a
one-way door — a logo on trucks, a product launched, a TM application filed, all
with a problem underneath. Over-calling is a two-way door — the attorney narrows
the list in review. Stay on the two-way door side.
Matter context
Matter context. Check ## Matter workspaces in the practice-level CLAUDE.md. If Enabled is ✗ (the default for in-house users), skip the rest of this paragraph — skills use practice-level context and the matter machinery is invisible. If enabled and there is no active matter, ask: "Which matter is this for? Run $ip-legal:matter-workspace switch <slug> or say practice-level." Load the active matter's matter.md for matter-specific context and overrides. Write outputs to the matter folder at config/local/codex-for-legal/ip-legal/matters/<matter-slug>/. Never read another matter's files unless Cross-matter context is on.
Load the practice profile first
Before running clearance, read config/local/codex-for-legal/ip-legal/CLAUDE.md. Pull:
Role from ## Who's using this (lawyer vs. non-lawyer changes the work-product header and the non-lawyer gate below).
Registered in and enforce where from ## IP practice profile and ## Enforcement posture (default jurisdictions if the user doesn't specify).
Integrations from ## Available integrations (CourtListener (connector optional; not enabled in v1) / Solve Intelligence / Descrybe (connector optional; not enabled in v1) — each determines what searches are available to run, what the fallback is, and what gets attributed in the output).
Decision posture from ## Decision posture on subjective legal calls — this skill never concludes "not confusingly similar."
If config/local/codex-for-legal/ip-legal/CLAUDE.md contains [PLACEHOLDER] or [Your Company Name], surface this bounce:
I notice you haven't configured your practice profile yet — that's how I tailor posture, jurisdictions, and approval chain to your practice.
Two choices:
Run $ip-legal:cold-start-interview (2 minutes) to configure your profile, then I'll run this tailored to YOUR practice.
Say "provisional" and I'll run this against generic defaults — US jurisdiction, middle risk appetite, lawyer role, no playbook — and tag every output [PROVISIONAL — configure your profile for tailored output] so you can see what I do before committing.
Provisional mode
If the user says "provisional," run the clearance normally using these generic defaults: middle risk appetite, lawyer role, US jurisdiction (USPTO + common-law), no playbook (do the full analysis rather than matching against a position list). Tag the reviewer note and every finding block with [PROVISIONAL]. At the end of the output, append:
"That was a generic run against default assumptions. Run $ip-legal:cold-start-interview to get output calibrated to YOUR practice — your playbook, your jurisdiction, your risk appetite. 2 minutes."
Intake
Ask once, in a single batch (don't drag out a quick job):
A few questions before I run the triage:
Proposed mark. Exact spelling, any stylization, and whether it's a word mark, logo, or both.
Goods or services. What's actually being sold or offered under this mark. A sentence or two — I'll map to international classes.
Classes. If you already know the Nice classes, list them. Otherwise describe the goods/services and I'll suggest the likely classes and confirm with you before running the search.
Jurisdictions. Where do you plan to use, register, or enforce? (US / EU / UK / Madrid / specific countries — I'll default to Registered in from your practice profile if you don't say.)
How it will appear in use. Any taglines, adjacent product names, trade dress, or design elements that would show up with it in market.
Wait for the answer. If the description is vague ("AI tool," "platform"), push once:
Give me the actual thing a customer sees — is it a consumer mobile app, enterprise API, physical product, service? The classes turn on this.
Knockout check
Before any database search, run the intrinsic problems that kill a mark regardless
of prior registrations. For each, assess plainly and flag. Do not rationalize away
a clear issue.
Bar
What it means
Flag when
Generic
The term IS the category (e.g., "Soap" for soap)
The mark names what the thing is
Descriptive
Directly describes a feature, function, quality, or ingredient
A consumer reads the mark and knows what the product does without imagination
Deceptive / deceptively misdescriptive
Misrepresents a material feature
The mark suggests a quality the goods don't have and that quality would matter
Primarily geographically descriptive / deceptive
Mark is primarily a place name and goods come from (or don't) that place
Mark = place + generic; or place + goods where customers would assume origin
Primarily merely a surname
Mark is primarily a surname
Mark reads as someone's last name to the relevant consumer
False connection
Mark falsely suggests connection with person, institution, national symbol
Mark invokes a specific identifiable person or institution
Prohibited matter
Flags, coats of arms, insignia, specific prohibited categories
Mark contains a prohibited element
Functional (for design marks / trade dress)
The feature is essential to use or affects cost/quality
Design mark — and the feature performs a function
Note on scandalous/immoral marks: after Iancu v. Brunetti (2019) and Matal v.
Tam (2017), the USPTO no longer refuses registration on those bases. The
surviving statutory bar in this zone is false connection under §2(a). Apply that;
don't flag under the struck-down bars.
Output: for each knockout category, either "no issue identified" or a
specific flag with a one-line reason. Don't produce a blank table of passes.
Similar marks check
The purpose here is to find potentially confusingly similar prior marks, not
to decide whether confusion is likely. That is the attorney's call.
What the user has connected
Read ## Available integrations from config/local/codex-for-legal/ip-legal/CLAUDE.md:
If a trademark search connector is available (Solve Intelligence,
Descrybe (connector optional; not enabled in v1) — or any MCP exposing TM-registry search): run a preliminary search
across the relevant classes and jurisdictions. Attribute every result to its
source. Note the date of the search and the scope (which registries, which
classes, exact-match vs. fuzzy, design search or not).
If a legal research connector is available (CourtListener (connector optional; not enabled in v1) for litigation for case law and TTAB decisions): sweep for reported disputes involving
the mark or a close variant. Same attribution rule.
If no search connector is available: say so, explicitly, in the output.
Do not infer results from model knowledge and present them as search findings.
Fallback when no database access exists
Write out, in the output, this exact statement:
No database search was run. This triage did not hit TESS, Solve
Intelligence, Descrybe (connector optional; not enabled in v1), CourtListener (connector optional; not enabled in v1), state registries, Madrid/WIPO, or any
common law / unregistered-mark sources. A knockout or full search across those
databases is required before any conclusion about availability. The triage
below is limited to intrinsic-bar analysis and structured confusion factors
against marks the user has identified or that come up in the conversation.
Then proceed — the intrinsic checks and the factors analysis are still useful,
just labeled honestly.
For each similar mark found (or supplied)
Capture:
Mark (exact characters, any stylization)
Source (TESS registration no., Madrid designation, state registry, case
citation, domain, social handle — whichever)
Classes / goods-services description from the register
Owner
Status (registered / pending / abandoned / cancelled — a dead mark is not a
bar but can be relevant to fame and to a predecessor's rights)
First-use date if available
Do not supplement silently. If you cite a USPTO registration number, it came
from the search you ran; if you describe a mark the user mentioned, say that.
Never invent a registration and never "fill in" a detail the record doesn't
support. If the search didn't return a first-use date, write "first-use date not
available from search result" — do not guess.
Adjacent families sweep (required before concluding)
A clearance that only checks exact and near-exact matches misses the marks a
competitor adopted because yours was taken. Before concluding, identify 3–5
adjacent word families the practitioner should also sweep, and ask the user to
confirm or add to the list.
Adjacent families are category-conventional substitutes a reasonable competitor
would consider when the direct mark is unavailable. For a mark like
NEXUS HOME in the smart-home hub space, the adjacent families include at
minimum:
Assistant-style names in the same product category: ALEXA,
ECHO, SIRI, GOOGLE HOME, CORTANA, HOMEY, HOMEBASE.
HOME / HOUSE / SMART variants: SMART HOME, HOUSEHOLD, HOUSE,
ABODE, CASA, DOM.
Phonetic twins on the root: NEXIS, NEKSUS, NEXXUS, NECTIS,
KNOXUS (depending on how the word sits in the market).
The skill should output an adjacent-families block in the Similar Marks section
with a confirmation prompt:
Adjacent families to sweep (please confirm or add):
[family 1 — e.g., HUB / NEST / LINK / CONNECT]
[family 2 — e.g., ALEXA-style assistant names]
[family 3 — e.g., HOME / HOUSE / SMART variants]
[family 4 — phonetic twins on the root]
A clearance that only checks exact and near-exact matches misses the marks a
competitor adopted because yours was taken. Confirm this list is complete for
the category before I continue.
When non-English-speaking jurisdictions are in scope, the English-only phonetic sweep misses the most common source of cross-border conflicts. Add:
Translation equivalents. The mark translated into the relevant languages. The EU's foreign-equivalents doctrine treats a translation as the same mark for confusion purposes.
Transliteration. The mark written in the relevant script (Cyrillic, Chinese/Japanese/Korean, Arabic, Hangul, Thai). Phonetic equivalence across scripts is a recognized conflict basis.
Script variations. Marks registered in a non-Latin script that sound like your mark when romanized.
If you can't perform cross-language analysis, say so: "Cross-language phonetic and translation-equivalent analysis not performed — this is the most common source of cross-border conflicts. A clearance search in [jurisdiction] should include it."
If the practitioner has a connected TM search tool, re-run the sweep against
each confirmed adjacent family (exact + phonetic + translation-of-foreign-equivalent
where relevant) and add the results to the Similar Marks table with the
Adjacent family source noted. If no connector is available, say so, and list
the families as the explicit next-step input for a full professional search —
do not silently skip the sweep.
Likelihood-of-confusion factors
Confusion framework is jurisdiction-specific. The US and EU assess likelihood of confusion differently. Don't apply the wrong one.
US (federal circuits): Multi-factor tests (du Pont, Polaroid, Sleekcraft) — strength of the mark, similarity (sight/sound/meaning), proximity of goods, channels, buyer sophistication, actual confusion, intent.
EU (Art. 8(1)(b) EUTMR): Global appreciation — all relevant factors assessed holistically through the eyes of the average consumer. Key differences: greater weight on phonetic similarity; translation equivalents as standard (the mark translated into EU languages); "likelihood of association" beyond source confusion; the distinctiveness of the earlier mark carries more weight.
UK (TMA 1994 §5(2)): Follows the EU global appreciation approach post-Brexit but diverging case law. Check for UK-specific decisions.
Other jurisdictions: If the intake includes a jurisdiction without a framework above, say: "I don't have [jurisdiction]'s confusion framework. Applying the US test would give you a wrong answer that looks right. Options: (a) I search for the applicable standard, (b) you route to a [jurisdiction] trademark specialist, (c) I note this jurisdiction is out of scope." Never silently apply US doctrine.
The relevant circuit's test determines the factors to walk through. Cite the
test that applies:
TTAB / Federal Circuit:In re E. I. du Pont de Nemours & Co., 476 F.2d
1357 (C.C.P.A. 1973) (13 factors).
Second Circuit:Polaroid Corp. v. Polarad Electronics Corp., 287 F.2d 492
(2d Cir. 1961) (8 factors).
Ninth Circuit:AMF Inc. v. Sleekcraft Boats, 599 F.2d 341 (9th Cir. 1979)
(8 factors).
Other circuits: walk through the circuit's named multi-factor test (e.g.,
Frisch's Restaurants in the Sixth Circuit, Scotch Whisky Association in the
Seventh, Lapp in the Third).
Pick based on where the user plans to enforce (practice profile), the TTAB if
the immediate forum is registration, or the primary commercial forum otherwise.
Note your pick in the output.
For each factor, produce a flag, not a verdict. Each factor should say what
cuts each way and where the uncertainty is:
Similarity of marks (appearance, sound, meaning / connotation, commercial
impression). Sight-sound-meaning, considered together.
Similarity of goods or services. Not whether the goods are identical —
whether consumers would expect them to come from the same source.
Channels of trade. Where each side actually sells (or would sell). Same
stores? Same distribution? Same trade shows? Online-only?
Sophistication of consumers. Impulse buy at a gas station vs. considered
enterprise purchase changes the standard of care.
Strength of prior mark found. Fanciful / arbitrary / suggestive /
descriptive / generic, and fame evidence if any. A strong prior mark gets
wider protection.
Intent. Evidence of intent to trade on goodwill — a near-copy with similar
trade dress in an adjacent class is different from an independent coinage.
Actual confusion. Any evidence (misdirected inquiries, surveys, reviews,
social posts).
Likelihood of expansion (bridge-the-gap). Whether the senior user is
likely to expand into the junior's lane, and vice versa.
Per the decision posture in config/local/codex-for-legal/ip-legal/CLAUDE.md:
Never conclude "not confusingly similar."
If uncertain, write: "Similar marks found — confusion assessment required
before adoption." Or: "Factors cut both ways; attorney judgment required."
Clear space for "no similar marks found in the databases searched" is fine
only if a real search was run; see the no-search fallback above otherwise.
Recommended next steps
Every clearance output ends with concrete next steps, bucketed by what the
triage found:
If knockout issues found: reframe the mark, or accept the descriptiveness
bar and plan for secondary-meaning over time; route for attorney review before
adopting.
If similar marks found in the databases searched: attorney review is
required before adopting, filing, or marketing. Often the next step is a full
professional search to find everything the triage missed.
If no similar marks found but no database search ran: a full search is
required before adoption. Name the databases that need to be hit.
If similar marks found and the senior mark is weak, old, in a different
class, or abandoned: flag for attorney review — the triage will not make
this call.
Always: a full clearance opinion from registered trademark counsel, scaled
to the investment the mark will carry. A mark you'll put on a product line and
a Super Bowl ad carries more weight than a mark for a one-off pop-up.
Output format
Prepend the work-product header from config/local/codex-for-legal/ip-legal/CLAUDE.md## Outputs.
[WORK-PRODUCT HEADER]
# Trademark Clearance — First Pass (NOT AN OPINION)**This is a first pass, not a clearance opinion.** A clearance opinion requires
a full professional search and attorney judgment. A "no obvious conflicts"
result here means the triage didn't find anything — it does not mean the mark
is clear. A registered trademark attorney evaluates before anyone adopts, files,
or invests in this mark.
**Triage result:** [GREEN / YELLOW / RED — one sentence why]
## Proposed mark-**Mark:** [exact text, stylization noted]
-**Mark type:** [word / design / composite]
-**Goods / services:** [description]
-**Classes:** [Nice class numbers with one-line descriptions]
-**Jurisdictions:** [US / EU / UK / Madrid / specific countries]
-**Confusion test applied:** [du Pont / Polaroid / Sleekcraft / other — with the
reason it's the right one]
## Knockout issues
| Bar | Flag | Note |
|---|---|---|
| Generic / descriptive / deceptive / geographic / surname / false connection / prohibited / functional | [none / flagged] | [one line if flagged] |
## Similar marks check**Sources searched:** [registries and databases hit, with dates — or "no database
search run; see scope note below."]
**Scope:** [classes, jurisdictions, exact-vs-fuzzy, design search or not]
**Adjacent families swept (confirmed with user):**- [family 1 — e.g., HUB / NEST / LINK / CONNECT / BRIDGE / GATEWAY]
- [family 2 — e.g., ALEXA-style assistant names]
- [family 3 — e.g., HOME / HOUSE / SMART variants]
- [family 4 — phonetic twins on the root]
*A clearance that only checks exact and near-exact matches misses the marks a
competitor adopted because yours was taken. If any family was not swept (no
connector, time not available), it is listed explicitly as a next-step input
to the full professional search — not silently skipped.*
| Mark | Source | Classes / G&S | Owner | Status | First use | Note |
|---|---|---|---|---|---|---|
| [exact] | [registration no. / citation / URL] | [class list] | [owner from record] | [reg/pending/abandoned/cancelled] | [date or "not available"] | [why it matters — exact match / adjacent family] |
*If no search was run:***No database search was run.** This triage did not hit
TESS, Solve Intelligence, Descrybe (connector optional; not enabled in v1), CourtListener (connector optional; not enabled in v1), state registries,
Madrid/WIPO, or any common law / unregistered-mark sources. A knockout or full
search across those databases is required before any conclusion about availability.
## Confusion factors — flags for attorney review
For each of the factors under the test applied, a one-line flag noting what cuts
each way.
| Factor | Flag | Direction |
|---|---|---|
| Similarity of marks (sight / sound / meaning / commercial impression) | [note] | [weighs toward / against conflict / mixed] |
| Similarity of goods or services | [note] | [direction] |
| Channels of trade | [note] | [direction] |
| Consumer sophistication | [note] | [direction] |
| Strength of prior mark | [note] | [direction] |
| Intent | [note] | [direction] |
| Actual confusion | [note or "no evidence surfaced"] | [direction] |
| Likelihood of expansion / bridge-the-gap | [note] | [direction] |
**Conclusion on confusion:***This skill does not conclude.* Either:
- "Similar marks found; attorney confusion assessment required before adoption."
- "No similar marks found in the databases searched; full clearance required
before adoption."
- "Factors cut both ways; attorney judgment required."
## Recommended next steps- [specific next step 1 — e.g., "Full professional search across USPTO, state
registries, common law sources, EUIPO, and UK IPO before adoption"]
- [specific next step 2 — e.g., "Design-around review of the `APEXLEAF` mark
in Class 25 if the intent is to proceed"]
- [specific next step 3 — e.g., "Reframe the mark — current form is descriptive
and will require secondary meaning"]
- [routing per `config/local/codex-for-legal/ip-legal/CLAUDE.md` —
trademark OC or in-house IP counsel named in the practice profile]
## Citation verification
Every case, registration number, statute, and database result in this memo must
be verified against the authoritative source before relying on it. Registration
numbers, class designations, and first-use dates are the most common sites of
error. Do not cite a result you cannot open.
Non-lawyer gate
Before issuing the output, read ## Who's using this. If the Role is Non-lawyer:
This output is a research triage, not legal advice. Adopting, filing, or
investing in this mark based on this triage alone has legal consequences —
including being sued for infringement over a mark that "passed" this check.
A registered trademark attorney needs to evaluate before you move.
Here's a brief to bring to an attorney — it'll cut the time the conversation
takes:
[Generate a 1-page summary: the proposed mark, the goods/services and classes,
the knockout issues (if any), the similar marks surfaced (if any), what was
and wasn't searched, and the three questions to ask the attorney.]
If you need to find a licensed attorney, solicitor, barrister, or other authorised legal professional in your jurisdiction: your professional regulator's referral service is the fastest starting point (state bar in the US, SRA/Bar Standards Board in England & Wales, Law Society in Scotland/NI/Ireland/Canada/Australia, or your jurisdiction's equivalent). The INTA (International Trademark Association)
maintains a member directory of registered trademark practitioners.
Deliver the full triage memo alongside the brief. Do not withhold the analysis.
Output location
If matter workspaces are enabled and a matter is active, write the output to
config/local/codex-for-legal/ip-legal/matters/<matter-slug>/outputs/clearance-<mark-slug>-YYYY-MM-DD.md.
Otherwise write to
config/local/codex-for-legal/ip-legal/outputs/clearance-<mark-slug>-YYYY-MM-DD.md
and surface the path to the user.
Append a one-line entry to the matter's history.md if a matter is active.
Close with the next-steps decision tree
End with the next-steps decision tree per CLAUDE.md ## Outputs. Customize the options to what this skill just produced — the five default branches (draft the X, escalate, get more facts, watch and wait, something else) are a starting point, not a lock-in. The tree is the output; the lawyer picks.
What this skill does not do
Conclude a mark is clear. Ever. The loudest guardrail in the plugin.
Substitute for TESS search, state-registry search, common-law search,
international search, watch-service check, or design-mark search.
File a trademark application. Filing is an attorney task; this skill
informs the decision to file.
Evaluate trade dress, trademark dilution, or famous-mark claims beyond a
preliminary flag. Dilution under the TDRA requires a fame analysis this
skill does not attempt.
Address foreign local-law bars (e.g., phonetic similarity standards in
Japan, translation-of-foreign-equivalents in the EU) beyond flagging that
foreign analysis is required when a foreign jurisdiction is in scope.
Quote outputs to customers, counterparties, or the press. This is
internal research. Privileged if the header at the top applies.
Tone
Crisp, concrete, honest about scope. The lawyer reading this output should know
in ten seconds what the triage found, what it didn't, and what has to happen
before anyone adopts the mark. No hedging prose. The guardrail at the top and
the "this skill does not conclude" line on confusion do the scope work.
