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 |
| 4712486 | Aerial ropeway transport installation with the rope stopping to detach the cars in the terminal An aerial ropeway transport installation comprises cars coupled to the rope by detachable grips. On the line the cars run in groups but are widely spaced in order to spread the load. In the terminal the cars are uncoupled from the rope at a corresponding ... | 12/15/1987 |