4. PAIR Resources | USPTO - United States Patent and Trademark Office
Link: https://www.uspto.gov/patents/apply/checking-application-status/pair-resources
Description: WEBDec 13, 2018 · PAIR is the United States Patent and Trademark Office's (USPTO's) safe, simple, and secure web-based means of electronically viewing the …
DA: 64 PA: 28 MOZ Rank: 16