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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 7283030 | Doubly-anchored thermal actuator having varying flexural rigidity A doubly-anchored thermal actuator for a micro-electromechanical device such as a liquid drop emitter or a fluid control microvalve is disclosed. The thermal actuator is comprised of a base element formed with a depression having opposing anchor. A deformable elemen... | 10/16/2007 |
| 6771158 | Micro electromechanical differential actuator A micro electromechanical differential actuator is comprised of a suspension arm structure and/or a bridge structure to make a two-degree-of-freedom and bi-directional motion. The actuator support base can make out-of-plane or in-plane vertical and horizontal motion... | 08/03/2004 |
| 6531947 | Direct acting vertical thermal actuator with controlled bending A micrometer sized, single-stage, vertical thermal actuator with controlled bending capable of repeatable and rapid movement of a micrometer-sized optical device off the surface of a substrate. The vertical thermal actuator is constructed on a surface of ... | 03/11/2003 |
| 5090436 | Temperature sensitive water supply shut-off system An automatic water supply shut-off system includes a shut-off valve movable between opened and closed positions in a line leading from the water supply. An electric motor actuates the shut-off valve and is electrically connected to a power source through ... | 02/25/1992 |
| 4832583 | Low pressure metering fluid pump A low pressure metering pump having a hollow piston reciprocated in a cylindrical guide by a solenoid coil. A pair of check valves provide for unidirectional fluid flow through the cylindrical guide in response to the reciprocation of the piston. A seal a... | 05/23/1989 |
