USPTO

USPTO Patent Assignment Search API

The USPTO Patent Assignment Search API retrieves patent assignment information including ownership transfers, recorded assignments, and assignment history for individual patents and patent portfolios.

GitHub

Documentation

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Documentation
https://developer.uspto.gov/api-catalog

API entry from apis.yml

apis.yml Raw ↑ 
aid: uspto:assignment-search-api
name: USPTO Patent Assignment Search API
description: The USPTO Patent Assignment Search API retrieves patent assignment information including
  ownership transfers, recorded assignments, and assignment history for individual patents and patent
  portfolios.
tags:
- Assignments
- Government
- Patents
- Regulatory
humanURL: https://developer.uspto.gov/api-catalog
properties:
- type: Documentation
  url: https://developer.uspto.gov/api-catalog