...that on Dec. 15, 1836, the Patent Office was completely destroyed by fire? Lost were some 7,000 models, 9,000 drawings, and 230 books plus all records of patent applications and grants.
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| Number | Title | Issue Date |
| 6945276 | Valve with unilaterally constrained piezoelectric bending element as actuating device Valve with a displaceable actuating device that controls the movements of at least one actual sealing element for opening and closing, and the actuating device is loaded with an elastic element essentially in a perpendicular direction relative to the direction of di... | 09/20/2005 |
| 4844149 | Warm-up/changeover valve or proximity switch A valve is provided with one inlet and two outlets with one of the outlets being normally closed by a valve in the form of a film disc carried by a flexible blade. A magnetic pad secured to the blade is attracted by the proximity of an actuator carrier ma... | 07/04/1989 |
| 4412650 | Snap acting heat motor operated gas valve A snap acting heat motor operated gas valve having a valve member carried by a spring blade that is secured to one end of an electrically heated control bimetal strip. Magnetic means associated with the spring blade normally bias the valve member to a clo... | 11/01/1983 |
| 4245814 | Fluid shut-off device A fluid shut-off device is provided which comprises a non-magnetic casing having a fluid passage therein, a metallic valve body movably disposed in the casing to close the passage at one operative position, and a magnetic member slidably disposed outside ... | 01/20/1981 |
| 4005726 | Thermomagnetic valve A hot fluid is directed through a valved conduit inlet. Downstream of the inlet, the conduit divides into a pair of outlets through which the hot fluid flows. The flow through the outlets is controlled by a pair of vertically oriented valves linked togeth... | 02/01/1977 |