Chang; Shih-Chih
Patent Applications and Registrations
Patent applications and USPTO patent grants for Chang; Shih-Chih.The latest application filed is for "movable electrical potentiometer contact assembly".
- Chang; Shih-Chih - Richland WA
| Patent | Date |
|---|---|
| Movable electrical potentiometer contact assembly Grant 5,422,452 - Chang , et al. June 6, 1 | 1995-06-06 |
| Device for preventing flooding caused by sprinkler failure Grant 4,867,603 - Chang September 19, 1 | 1989-09-19 |
| Rotary sight flow indicator Grant 4,745,877 - Chang May 24, 1 | 1988-05-24 |
| Valve and dash-pot assembly Grant 4,601,309 - Chang July 22, 1 | 1986-07-22 |
| Aeration method and apparatus Grant 4,267,052 - Chang May 12, 1 | 1981-05-12 |
| Gas-liquid mixing process and apparatus Grant 4,211,733 - Chang July 8, 1 | 1980-07-08 |
| Gas-liquid reaction method and apparatus Grant 4,207,180 - Chang June 10, 1 | 1980-06-10 |
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