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 |
| 6332112 | Method and apparatus for inspecting steam traps, and management system for managing steam traps An inspecting apparatus includes a measuring device and a processing unit. The measuring device is provided with a vibration detector for detecting the vibration of a steam trap when a valve thereof is closed. The processing unit is provided with a perfor... | 12/18/2001 |
| 5287878 | Free float steam trap This invention relates to a free float steam trap comprises a trap which casing having an inlet port and an outlet port and a valve chest formed therein, a valve seat member attached to the lower portion of the valve chest and having a valve orifice opene... | 02/22/1994 |
| 5168891 | Float valve and utilization system A closure member (64) is mounted at the lower end of a draw tube (14) for pivotal movement between an open position (FIG. 4) and a closed position (FIG. 3). The closure member (64) includes a first side part (68) having a lower outer surface (80) which co... | 12/08/1992 |
| 4678001 | Pump prime maintainer A device for controlling the flow through a suction pump to prevent loss of prime usable especially in narrow ditches and similar smaller areas, and consisting principally of a float controlled valve adapted to regulate the flow of fluid into the pump. Th... | 07/07/1987 |
| 4475569 | Float controlled condensate discharge device A condensate discharge device includes a housing formed with a flow chamber, and inlet and outlet pressure regions. A valve seat is disposed in the inlet region, and a closure part cooperates with the valve seat, so as to be able to rest thereon. A closed... | 10/09/1984 |
| 4108198 | Multirotary energy conversion valve A multirotary energy conversion valve comprising inlet and outlet passages interposed by meshing pairs of inlet and outlet rotors of unequal constant volume displacements with an enclosed channel in between for fluid energy conversion with additionally at... | 08/22/1978 |