# USPTO Patent Assignment Search API

**Canonical:** https://apis.io/apis/uspto-gov/assignment-search-api/  
**Provider:** USPTO — https://apis.io/providers/uspto-gov/  
**Documentation:** https://developer.uspto.gov/api-catalog

USPTO Patent Assignment Search API is one of 19 APIs that [USPTO](https://apis.io/providers/uspto-gov/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Assignments, Government, Patents, and Regulatory. The published artifact set on APIs.io includes API documentation.

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

## Machine-readable artifacts (1)

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

## Other USPTO APIs (12)

- [USPTO Appeals API](https://apis.io/apis/uspto-gov/uspto-gov-appeals-api/)
- [USPTO Application API](https://apis.io/apis/uspto-gov/uspto-gov-application-api/)
- [USPTO Assignments API](https://apis.io/apis/uspto-gov/uspto-gov-assignments-api/)
- [USPTO Citations API](https://apis.io/apis/uspto-gov/uspto-gov-citations-api/)
- [USPTO Datasets API](https://apis.io/apis/uspto-gov/uspto-gov-datasets-api/)
- [USPTO Decisions API](https://apis.io/apis/uspto-gov/uspto-gov-decisions-api/)
- [USPTO Documents API](https://apis.io/apis/uspto-gov/uspto-gov-documents-api/)
- [USPTO Enriched Citations API](https://apis.io/apis/uspto-gov/uspto-gov-enriched-citations-api/)
- [USPTO Office Actions API](https://apis.io/apis/uspto-gov/uspto-gov-office-actions-api/)
- [USPTO Patentsview API](https://apis.io/apis/uspto-gov/uspto-gov-patentsview-api/)
- [USPTO Proceedings API](https://apis.io/apis/uspto-gov/uspto-gov-proceedings-api/)
- [USPTO Rejections API](https://apis.io/apis/uspto-gov/uspto-gov-rejections-api/)

## Tags

Assignments, Government, Patents, Regulatory

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/uspto-gov/assignment-search-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/uspto-gov/.