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 |
| 5820103 | Ball segment valve and ball segment valve arrangement A ball segment valve comprise a valve housing (23) with a circular annular valve seat (28), a valve body (26) which has the shape of a spherical segment which is rotatable about an axis of rotation (49) which intersects the center of the sphere of which t... | 10/13/1998 |
| 4968000 | Valve A valve with a valve body (11, 43) in the form of a ball or of a segment of a ball has a second, concave, spherical sealing surface (20, 53) which is provided to be resiliently urged against a first sealing surface of the valve body, and at least an outer... | 11/06/1990 |
| 4770393 | Butterfly valve A butterfly valve comprises a valve housing (1) with an axial passage (4) for a fluid medium; a valve seat in the form of a seat ring (8) which is displaceable within a slot (7) in the valve housing in a radial direction relative to the axial passage, the... | 09/13/1988 |
| 4634097 | Sealing device for throttle valves The invention relates to a sealing device for such throttle valves as comprise a valve housing with a valve seat and a pivotally mounted throttle member which may be pressed against the valve seat to bring about a sealing contact between two interacting s... | 01/06/1987 |
| 4286769 | Valve seat A valve seat contains a seat ring (12) with flat, parallel side faces (19, 20). The seat ring consists of steel or possibly of PTFE. When the valve is being shut by a throttle (1), a sealing surface of the throttle is pressed against the seat ring which a... | 09/01/1981 |
| 4284264 | Butterfly valves A butterfly valve with a seal face (4)having two opposite, essentially spherical sections (h, i) intersected by a symmetry plane (k) through the throttle which coincides with an axis through a point (n) parallel with the torsional axis (j) of the throttle... | 08/18/1981 |
| 4254937 | Butterfly valve A butterfly valve with a seal face (4) having two opposite, essentially spherical sections (h, i) intersected by a symmetry plane (k) through the throttle which coincides with the torsional axis (j) of the throttle and two opposite, essentially conical se... | 03/10/1981 |
