Mark Twain (Samuel L. Clemens) received Patent No. 121,992 for "An Improvement in Adjustable and Detachable Straps for Garments." He later received two more patents: one for a self-pasting scrapbook and one for a game to help players remember important historical dates.
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| Number | Title | Issue Date |
| 6312034 | Vehicle bed and cargo area liner with integrated sliding floor extension A truck bed or vehicle cargo liner with integrated sliding bed extension including a drop-in truck bed liner or cargo liner (16) formed of composite/plastic materials with one or more molded composite/plastic or metal rails (18) integrally formed or attac... | 11/06/2001 |