From the National Archives Pieces of History Blog:
Just two weeks ago, the U.S. Patent and Trademark Office issued the 10 millionth utility patent on Tuesday, June 19, 2018. This is a historic milestone for the agency and for inventors in the United States. Did you know the National Archives holds 1,000,000 Utility Patent Drawings and 138,388 boxes of Patent Case Files?
I have at least two ancestors with patents. How about you?