Charles; Donald E.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Charles; Donald E..The latest application filed is for "stored energy for failsafe valve".
- Charles; Donald E. - Wauconda IL
- Charles; Donald E. - Lake Zurich IL
- Charles; Donald E. - Lake Zurick IL
| Patent | Date |
|---|---|
| Stored energy for failsafe valve Grant 10,213,633 - Charles Feb | 2019-02-26 |
| Temperature compensation for DC motor PWM applications Grant 10,110,158 - Charles October 23, 2 | 2018-10-23 |
| System for detecting a position of a fume hood sash Grant 10,109,071 - Charles October 23, 2 | 2018-10-23 |
| Stored Energy For Failsafe Valve App 20180036564 - Charles; Donald E. | 2018-02-08 |
| Apparatus for increasing resolution of resistance sensing Grant 9,791,486 - Charles October 17, 2 | 2017-10-17 |
| System For Detecting A Position Of A Fume Hood Sash App 20170061630 - Charles; Donald E. | 2017-03-02 |
| Sash position determining system Grant 9,541,378 - Charles , et al. January 10, 2 | 2017-01-10 |
| System for detecting a position of a fume hood sash Grant 9,527,119 - Charles December 27, 2 | 2016-12-27 |
| Maximizing Resolution Of Resistance Sensing App 20160334448 - Charles; Donald E. | 2016-11-17 |
| Increasing resolution of resistance measurements Grant 9,429,606 - Charles August 30, 2 | 2016-08-30 |
| Maximizing Resolution Of Resistance Sensing App 20150091591 - Charles; Donald E. | 2015-04-02 |
| Sash Position Determining System App 20140273783 - Charles; Donald E. ; et al. | 2014-09-18 |
| System For Detecting A Position Of A Fume Hood Sash App 20140080396 - Charles; Donald E. | 2014-03-20 |
| Switching power supply having dual current feedback Grant 7,295,451 - Charles November 13, 2 | 2007-11-13 |
| Switching power supply having dual current feedback App 20070217230 - Charles; Donald E. | 2007-09-20 |
| Fail-safe electric actuator using high voltage capacitors Grant 7,023,163 - Charles , et al. April 4, 2 | 2006-04-04 |
| Fail-safe electric actuator using high voltage capacitors App 20050127854 - Charles, Donald E. ; et al. | 2005-06-16 |
| Room temperature sensor and thermostat control device Grant 5,934,554 - Charles , et al. August 10, 1 | 1999-08-10 |
| Room temperature sensor and thermostat control device Grant 5,816,492 - Charles , et al. October 6, 1 | 1998-10-06 |
| Dosimeter for photometric applications Grant 4,468,562 - Wicnienski , et al. August 28, 1 | 1984-08-28 |
| Battery charging and testing circuit Grant 4,426,612 - Wicnienski , et al. January 17, 1 | 1984-01-17 |
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.
| 