RT @uspto: #DidYouKnow that author Samuel L. Clemens received a #patent #TDIH 145 years ago? It’s an improvement for suspenders. https://t.…
Source by U.S. Commerce Dept.
RT @uspto: #DidYouKnow that author Samuel L. Clemens received a #patent #TDIH 145 years ago? It’s an improvement for suspenders. https://t.…
Source by U.S. Commerce Dept.