Burns; Robert V.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Burns; Robert V..The latest application filed is for "ringing signal generator".
- Burns; Robert V. - Phoenix
- Burns; Robert V. - Tinely Park IL
- Burns; Robert V. - Tinley Park IL
| Patent | Date |
|---|---|
| Ringing signal generator Grant 5,001,748 - Burns , et al. March 19, 1 | 1991-03-19 |
| Series ringing signal generator Grant 4,962,527 - Burns , et al. October 9, 1 | 1990-10-09 |
| Ring signal generator for generating ring signals of different frequencies and power levels in response to user selection Grant 4,924,511 - Burns , et al. May 8, 1 | 1990-05-08 |
| Isolated drive circuit Grant 4,908,857 - Burns , et al. March 13, 1 | 1990-03-13 |
| Subscriber line circuit having improved AC impedance matching Grant 4,677,667 - Burns June 30, 1 | 1987-06-30 |
| Ringing voltage transfer circuit Grant 4,201,897 - Dorth , et al. May 6, 1 | 1980-05-06 |
| Circuit arrangement for ground start coin operated telephones Grant 3,890,468 - Burns , et al. June 17, 1 | 1975-06-17 |
| Selective D.c. Isolation Circuit Grant 3,798,470 - Burns , et al. March 19, 1 | 1974-03-19 |
| Tone Channels For Multifrequency Receivers Grant 3,582,565 - Beeman , et al. June 1, 1 | 1971-06-01 |
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.
| 