Duckworth; James J.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Duckworth; James J..The latest application filed is for "elevator polyphase motor control".
- Duckworth; James J. - Rockaway NJ
- Duckworth; James J. - Morris Plains NJ
| Patent | Date |
|---|---|
| Elevator polyphase motor control Grant 4,544,873 - Salihi , et al. October 1, 1 | 1985-10-01 |
| Brushless DC motor control utilizing a ROM Grant 4,270,074 - Duckworth , et al. May 26, 1 | 1981-05-26 |
| True Rms To Dc Converters Grant 3,723,845 - Duckworth March 27, 1 | 1973-03-27 |
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