Konrad; Charles E.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Konrad; Charles E..The latest application filed is for "method and apparatus for controlling operation of a submersible pump".
- Konrad; Charles E. - Roanoke VA
| Patent | Date |
|---|---|
| Method and apparatus for controlling operation of a submersible pump Grant 6,254,353 - Polo , et al. July 3, 2 | 2001-07-03 |
| Ground fault detection and protection method for a variable speed ac electric motor Grant 5,945,802 - Konrad , et al. August 31, 1 | 1999-08-31 |
| High speed deep well pump for residential use Grant 5,883,489 - Konrad March 16, 1 | 1999-03-16 |
| Method and apparatus for improved efficiency in a pulse-width-modulated alternating current motor drive Grant 5,486,748 - Konrad , et al. January 23, 1 | 1996-01-23 |
| Electric vehicle drive train with direct coupling transmission Grant 5,403,244 - Tankersley , et al. April 4, 1 | 1995-04-04 |
| Electric vehicle drive train with rollback detection and compensation Grant 5,376,869 - Konrad December 27, 1 | 1994-12-27 |
| Electric vehicle drive train with contactor protection Grant 5,369,540 - Konrad , et al. November 29, 1 | 1994-11-29 |
| Method and apparatus for improved efficiency in a pulse-width-modulated alternating current motor drive Grant 5,287,051 - Konrad , et al. February 15, 1 | 1994-02-15 |
| Protection system for alternating current, battery powered electric traction motor vehicle Grant 5,227,703 - Boothe , et al. July 13, 1 | 1993-07-13 |
| Distributed input/output system Grant 4,870,564 - Ketelhut , et al. * September 26, 1 | 1989-09-26 |
| Distributed input/output system Grant 4,764,868 - Ketelhut , et al. August 16, 1 | 1988-08-16 |
| Dual function input/output for a programmable controller Grant 4,593,380 - Kocher , et al. June 3, 1 | 1986-06-03 |
| Turning speed controller for electric vehicles having dual drive motors Grant 4,520,299 - Konrad May 28, 1 | 1985-05-28 |
| Dual motor proportioning control Grant 4,500,818 - Konrad , et al. February 19, 1 | 1985-02-19 |
| Electric vehicle protection scheme Grant 4,449,080 - Konrad , et al. May 15, 1 | 1984-05-15 |
| Electric vehicle current regulator Grant 4,427,930 - Berman , et al. January 24, 1 | 1984-01-24 |
| Electric vehicle current regulating system Grant 4,423,362 - Konrad , et al. December 27, 1 | 1983-12-27 |
| Battery state-of-charge indicator Grant 4,234,840 - Konrad , et al. November 18, 1 | 1980-11-18 |
| Controlled Variable Time Ratio Control Circuit Grant 3,803,472 - Konrad April 9, 1 | 1974-04-09 |
| Synchronization Scheme Grant 3,801,796 - Konrad April 2, 1 | 1974-04-02 |
| Direct Current Chopper Control Circuit Grant 3,753,077 - Anderson , et al. August 14, 1 | 1973-08-14 |
| Three Phase System Monitoring And Control Circuit Grant 3,727,103 - Finch , et al. April 10, 1 | 1973-04-10 |
| Direct Current Control Circuit Grant 3,660,738 - Anderson , et al. May 2, 1 | 1972-05-02 |
| Direct Current Control Circuit Grant 3,656,039 - Konrad April 11, 1 | 1972-04-11 |
| Frequency Polyphase Power Supply Grant 3,641,566 - Konrad , et al. February 8, 1 | 1972-02-08 |
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.
| 