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United States Patent and Trademark Office, U.S. Patents, 1970-2019

• Title	United States Patent and Trademark Office, U.S. Patents, 1970-2019
  Author	Ancestry.com
  Publisher	Ancestry.com Operations Inc
  Repository	Ancestry.com
  _APID	1,62219::0
  Source ID	S1872111438
  Linked to (1)	Living