Mark Twain was granted U.S. Patent No. 121,992 for an adjustable and detachable garment strap on December 19, 1871.
Sources
- Unswerving irregularity | USPTO (uspto.gov)
- https://patents.google.com/patent/US121992A/en (patents.google.com)
- https://www.marktwainhouse.org/ (marktwainhouse.org)
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