# GovParse Patent Assignee Search

> GovParse Patent Assignee Search is a paid API for AI agents from api.govparse.io, paid per call via x402, $1.25/call, status unknown (last checked 2026-09-14).

Search and filter entity-resolved patent assignee organizations with stats on first/last grant dates, patent counts, CPC subclasses, and inventor counts — with a flag to isolate brand-new-to-patenting companies.

## Facts

- Endpoint: GET https://api.govparse.io/v1/patents/assignees/search
- Price: $1.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/govparse-patent-assignee-search-55285162
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_tsVNYACT1Aix9hn5GyZu5

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability govparse-patent-assignee-search-55285162
```

Example prompt: Find companies that got their very first US patent grant in 2024 in AI/ML (CPC subclass G06N), based in California — sort by patent count descending and show me the top 25.

## When to prefer this

Choose this endpoint when you need to identify organizations as patent holders with aggregate statistics — especially when discovering first-time patentors (new_assignee=true) for VC or corporate development signals. Prefer this over the individual-patent search endpoint when your unit of analysis is the company, not a specific patent grant. Best when you need to slice by technology area (CPC), geography, and grant date windows simultaneously.

## Known failure modes

- Invalid CPC subclass code returns empty results or 400 error
- Unrecognized state/country codes may silently return no results
- new_assignee=true with a broad date range may return very large result sets requiring pagination
- Entity UUID mismatches return no results if the ID isn't in the resolved entities database
- Rate limiting or payment failure (x402) if USDC payment not properly handled

## How this service works

Which companies are new to patenting, and in what technology? Search patent assignee ORGANIZATIONS (entity-resolved), each with first/last grant date, patent count, distinct CPC subclasses, and inventor count. new_assignee=true isolates orgs with their first-ever US patent grant (emerging/stealth signal for VC deal sourcing and corp-dev); narrow by CPC subclass, state/country, first-grant window, or patent_count_min. PatentsView grants (CC BY 4.0), observational.

## Output

A paginated list of entity-resolved assignee organizations, each including: organization name, resolved entity ID, first grant date, last grant date, total patent count, list of distinct CPC subclasses patented in, and inventor count. Filterable by new-assignee flag, technology area, geography, and grant date window.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "properties": {
  "input": {
   "type": "object",
   "required": [],
   "properties": {
    "sort": {
     "type": "string",
     "examples": [
      "patent_count:desc"
     ],
     "description": "field:direction — patent_count | first_grant_date | last_grant_date. Default 'last_grant_date:desc'."
    },
    "limit": {
     "type": "integer",
     "examples": [
      25
     ],
     "description": "Max rows (default 25, cap 100)."
    },
    "state": {
     "type": "string",
     "examples": [
      "CA"
     ],
     "description": "Assignee state code(s), CSV."
    },
    "offset": {
     "type": "integer",
     "examples": [
      0
     ],
     "description": "Rows to skip, for paging."
    },
    "country": {
     "type": "string",
     "examples": [
      "US"
     ],
     "description": "Assignee country code(s), CSV (ISO)."
    },
    "assignee": {
     "type": "string",
     "examples": [
      "labs"
     ],
     "description": "Assignee organization (company) name fragment."
    },
    "cpc_subclass": {
     "type": "string",
     "examples": [
      "G06N"
     ],
     "description": "CPC subclass/class/section the org patents in, CSV. G06N=AI/ML."
    },
    "new_assignee": {
     "type": "string",
     "examples": [
      "true"
     ],
     "description": "true → only new/emerging assignees (first-ever patent grant recent)."
    },
    "assignee_entity": {
     "type": "string",
     "examples": [
      "3f6a1c9e-2b4d-4a8e-9c1f-7e2d5a6b8c90"
     ],
     "description": "Resolved entities.employers entity_id (UUID), exact match."
    },
    "patent_count_max": {
     "type": "integer",
     "examples": [
      50
     ],
     "description": "Maximum granted-patent count held by the org (lifetime total)."
    },
    "patent_count_min": {
     "type": "integer",
     "examples": [
      3
     ],
     "description": "Minimum granted-patent count held by the org (lifetime total)."
    },
    "pct_increase_min": {
     "type": "number",
     "examples": [
      100
     ],
     "description": "Minimum percent increase, recent window vs prior window (100 = the count doubled) — the real patent-surge threshold."
    },
    "first_grant_after": {
     "type": "string",
     "examples": [
      "2024-01-01"
     ],
     "description": "Org's first observed grant on or after (YYYY-MM-DD)."
    },
    "first_grant_before": {
     "type": "string",
     "examples": [
     
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/govparse-patent-assignee-search-55285162/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.govparse.io](https://www.zero.xyz/host/api.govparse.io/llms.txt)