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 |
| 7364530 | Workout apparatus A collapsible workout apparatus is disclosed. The apparatus includes a crossbar member with support legs pivotally attached at each end. The supports legs are operable to pivot outward to a trapezoid shape to form a self-standing structure with the crossbar member s... | 04/29/2008 |
| 7134207 | Foldable utility knife A utility knife having a handle and a blade holder movably mounted on the handle for movement from an unfolded position to a folded position. The handle has a space adapted to receive the blade holder when the blade holder is in its folded position. The blade holder... | 11/14/2006 |
| 5902187 | Portable lawn swing A portable lawn swing which has a relatively stable frame of a simple construction and lightweight for transportability purposes. The inventive device includes an X-member, four base members attached to the ends of the X-member, four legs attached to the ... | 05/11/1999 |
| 4190283 | Foldable play gym A play gym comprising a horizontal bar from which swings and other rides are suspended is supported at its opposite ends by legs. Special pivot joints connect the pairs of legs to the horizontal bar which permit each pair of legs to be folded together and... | 02/26/1980 |
