loadpatents
Patent applications and USPTO patent grants for Robertson, Jr.; John W..The latest application filed is for "current fault detection system and method for ac controller".
Patent | Date |
---|---|
Current fault detection system and method for AC controller Grant 4,875,000 - Fry , et al. October 17, 1 | 1989-10-17 |
Automatic calibration and control system for a combined oxygen and combustibles analyzer Grant 4,852,384 - Woolbert , et al. August 1, 1 | 1989-08-01 |
Apparatus for monitoring low-level combustibles Grant 4,846,410 - Jewett , et al. July 11, 1 | 1989-07-11 |
Apparatus for monitoring low level combustibles Grant 4,778,113 - Jewett , et al. October 18, 1 | 1988-10-18 |
Electro-mechanical integrator Grant 4,692,933 - Wroblewski , et al. September 8, 1 | 1987-09-08 |
Digital generation of 3-phase PWM waveforms for variable speed control of induction motor Grant 4,599,550 - Robertson, Jr. , et al. July 8, 1 | 1986-07-08 |
High torque servo positioner using 3 phase variable frequency constant torque controller Grant 4,456,865 - Robertson, Jr. , et al. June 26, 1 | 1984-06-26 |
uspto.report is an independent third-party trademark research tool that is not affiliated, endorsed, or sponsored by the United States Patent and Trademark Office (USPTO) or any other governmental organization. The information provided by uspto.report is based on publicly available data at the time of writing and is intended for informational purposes only.
While we strive to provide accurate and up-to-date information, we do not guarantee the accuracy, completeness, reliability, or suitability of the information displayed on this site. The use of this site is at your own risk. Any reliance you place on such information is therefore strictly at your own risk.
All official trademark data, including owner information, should be verified by visiting the official USPTO website at www.uspto.gov. This site is not intended to replace professional legal advice and should not be used as a substitute for consulting with a legal professional who is knowledgeable about trademark law.