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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 6041809 | Two stage flush control valve assembly A control valve assembly for flushing a sanitary fixture includes a burst valve for supplying flush water flow at the beginning of a flush cycle and an independently controlled bypass valve for providing trap reseal flow after the burst valve closes. The ... | 03/28/2000 |
| 4989628 | Moisture-responsive valve assembly A moisture-responsive valve assembly includes a housing having a moisture-swellable body to swell in volume in response to soil moisture, and a bi-stable snap-action device for controlling the valve in response to the volume of the moisture-swellable body... | 02/05/1991 |
| 4884781 | Tamper resistant valve assembly primarily adapted for sampling of fluids A valve assembly is disclosed in which a valve adapted for opening a fluid passage is normally biased into closed position. The valve is opened by movement of a piston operated by hydraulic pressure of a liquid contained in a chamber disposed behind the p... | 12/05/1989 |
| 4569369 | Timer-controlled valve particularly for irrigation A timer-controlled valve comprises a valve member movable from a home position to an actuated position with respect to a passageway in the valve housing, an operator manually movable from a home position to a plurality of preselected actuated positions to... | 02/11/1986 |
| 4471937 | Fluid flow control valve A fluid flow control valve in which flow from an inlet (14) to an outlet (16) is controlled by engagement between a surface (92) and a seat (90). The surface (92) is displaced from the seat (90) when a closure member (44) is lifted to permit flow from a c... | 09/18/1984 |
| 4236669 | Thermostatic expansion valve with lead-lag compensation A thermostatic expansion device for use in refrigeration systems includes a valve member adapted to control the flow of liquid refrigerant from a condenser to an evaporator of the refrigeration system. A pressure-responsive device is operatively connected... | 12/02/1980 |
