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 |
| 5419292 | Positive-displacement machine with reciprocating and rotating pistons, particularly four-stroke engine Four elements (9a, 9b, 11a, 11b) are mutually articulated as a parallelogram deformable according to four parallel axes (A1, . . . A4). A crank (31) causes a circular motion of a first co-ordination axis (K1) connected to one (9a) of the elements. Another... | 05/30/1995 |
| 5366355 | Positive displacement pump A rotor rides on the shaft end and is eccentric with respect to the rotational axis of the shaft. The rotor rotates in the bore of a pivot ring and coacts therewith in the nature of a double action pumping such that there are two pumping cycles per revolu... | 11/22/1994 |
| 5004409 | Displacement machine A prime mover or pump comprising of a first stationary plate and a second plate arranged parallel to the stationary plate and spaced therefrom. The second plate is rotatably mounted about its central axis. A plurality of elongated wall elements are dispos... | 04/02/1991 |
| 4932206 | Guide vane assembly for auxiliary power unit A guide vane assembly for controllably varying fluid mass flow rates past compressor blades in an auxiliary power unit. The auxiliary power unit comprises a rotary apparatus for compressing fluid in a compressor housing wherein a plurality of compressor b... | 06/12/1990 |
| 4558991 | Wave pump assembly A positive displacement wave pump assembly for pumping liquid or gaseous or plastic fluids or mixtures thereof with solids or the like, including an elongated cylindrical tube or barrel having an upstream end and a downstream or discharge end, a drive sha... | 12/17/1985 |
