Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 4705212 | Method and apparatus for managing steam systems A steam system management method and apparatus includes a condensate collection reservoir with a pilot operated, pressure actuated dump valve that has a quick, snap action fully open/fully closed mode of operation. The pilot operation of the dump valve is... | 11/10/1987 |
| 4505427 | Condensate drain valves Solenoid operated condensate drain valve arrangements for steam systems are described having the following features: (a) powered by electromotive force obtained by the Seebeck effect; (b) where electrical sensing probe means control operation of the arrangemen... | 03/19/1985 |
