Douglas; Ellwood S.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Douglas; Ellwood S..The latest application filed is for "combination weighing machine with feed control".
- Douglas; Ellwood S. - Orinda CA
| Patent | Date |
|---|---|
| Combination weighing machine with feed control Grant 5,270,495 - Mosher , et al. December 14, 1 | 1993-12-14 |
| Combination weighing system Grant 4,550,792 - Mosher , et al. * November 5, 1 | 1985-11-05 |
| Combination weighing machine with adaptive signal correction Grant 4,529,050 - Mosher , et al. July 16, 1 | 1985-07-16 |
| Electric circuit breaker with ground fault protection Grant 4,000,444 - Douglas , et al. December 28, 1 | 1976-12-28 |
| Ground Fault Protective System Grant 3,836,821 - Wahlgren , et al. September 17, 1 | 1974-09-17 |
| Electric Receptacle Assembly With Ground Fault Protection Grant 3,813,579 - Doyle , et al. May 28, 1 | 1974-05-28 |
| Differential Transformer With Balancing Means Grant 3,665,356 - Douglas , et al. May 23, 1 | 1972-05-23 |
| Coupling Transformer Assembly Grant 3,629,759 - Douglas , et al. December 21, 1 | 1971-12-21 |
| Ground Fault Protective System Having Grounded Neutral Protection Grant 3,611,035 - Douglas October 5, 1 | 1971-10-05 |
| Modulating Ground Fault Detector And Interrupter Grant 3,597,656 - Douglas August 3, 1 | 1971-08-03 |
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