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 |
| 7004250 | Sealing system for the interspace in the transition region between two well pipes of different diameters, and mounting tool for this A sealing system for the interspace in the transition region between two well pipes of different diameters, and a mounting tool for producing the sealing connection. The mounting tool is lowered via a drilling string through a larger diameter pipe and, with a sealin... | 02/28/2006 |