Schopfer; Walter S.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Schopfer; Walter S..The latest application filed is for "method and apparatus for power savings in a switching regulator".
- Schopfer; Walter S. - Austin TX
- Schopfer; Walter S. - Harrison NY
| Patent | Date |
|---|---|
| Method and apparatus for power savings in a switching regulator Grant 7,541,790 - Schopfer , et al. June 2, 2 | 2009-06-02 |
| Multi-mode regulator Grant 7,450,360 - Schopfer November 11, 2 | 2008-11-11 |
| Method and apparatus for power savings in a switching regulator App 20070285069 - Schopfer; Walter S. ; et al. | 2007-12-13 |
| Multi-mode regulator App 20070279819 - Schopfer; Walter S. | 2007-12-06 |
| Method and apparatus for handling voice and data signals Grant 6,990,191 - Anderson , et al. January 24, 2 | 2006-01-24 |
| Method and apparatus for sensing current Grant 6,778,663 - Schopfer August 17, 2 | 2004-08-17 |
| Method and apparatus for impedance matching Grant 6,728,370 - Anderson , et al. April 27, 2 | 2004-04-27 |
| Method and apparatus for handling voice and data signals App 20020114444 - Anderson, Jeffrey Jay ; et al. | 2002-08-22 |
| Digital direct current feed control for a communication system Grant 5,878,133 - Zhou , et al. March 2, 1 | 1999-03-02 |
| Integrated ring sensor with fault detection Grant 5,809,109 - Moyal , et al. September 15, 1 | 1998-09-15 |
| Power cross detection using loop current and voltage Grant 5,640,451 - Schopfer June 17, 1 | 1997-06-17 |
| Protection circuit for telephone systems Grant 5,638,440 - Nix , et al. June 10, 1 | 1997-06-10 |
| Appliance Removal Alarm System For Motels Grant 3,766,540 - Schopfer , et al. October 16, 1 | 1973-10-16 |
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.
| 