clearance
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. Th
By anthropics · 524 installs
npx skills add anthropics/claude-for-legal --skill clearance
Source repository · Upstream listing
/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
1. Read ~/.claude/plugins/config/claude for legal/ip legal/CLAUDE.md . If it
contains [PLACEHOLDER] , stop and direct to /ip legal:cold start interview .
2. Follow the workflow below.
3. Run intake (mark, goods/services, classes, jurisdictions, visual/stylization).
4. Knockout check for intrinsic bars — generic, descriptive, deceptive,
geographic, surname, false connection, prohibited matter, functional.
5. Similar marks search against what's connected (Solve Intelligence, CourtListener, Descrybe, or whatever MCP is available). If nothing is
connected, say so in the output and proceed with the factor analysis only.
6. Walk the applicable circuit's likelihood of confusion factors — du Pont /
Polaroid / Sleekcraft / other. Flag each; never conclude.
7. 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.
8. 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
(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 ~/.claude/plugins/config/claude 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 ~/.claude/plugins/config/claude 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 / Solve Intelligence / Descrybe — 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 ~/.claude/plugins/config/claude 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:
1. Proposed mark. Exact spelling, any stylization, and whether it's a word mark, logo, or both.
2. Goods or services. What's actually being sold or offered under this mark. A sentence or two — I'll map to international classes.
3. 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.
4. 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.)
5. 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 ~/.claude/plugins/config/claude for legal/ip legal/CLAUDE.md :
If a trademark search connector is available (Solve Intelligence,
Descrybe — 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 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, CourtListener, 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:
Category synonyms for NEXUS: HUB , NEST , CORE , LINK , CONNECT ,
BRIDGE , CENTRAL , GATEWAY .
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):