Celebrity Inventors
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 |
| 4638884 | Chambered headrest mounting for stereophonic loudspeakers A headrest hollow casing has a central vented chamber connecting end chambers in which stereophonic loudspeakers are mounted and such central chamber is loosely filled with batting or other sound-damping material. The casing is supported by mounting rods ... | 01/27/1987 |
