Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5121069 | Low frequency sinewave generator | Sanjay Gupta | 1992-06-09 |
| 5001748 | Ringing signal generator | Sanjay Gupta | 1991-03-19 |
| 4965692 | Overload detector and protection circuit | Sanjay Gupta | 1990-10-23 |
| 4962527 | Series ringing signal generator | Sanjay Gupta | 1990-10-09 |
| 4924511 | Ring signal generator for generating ring signals of different frequencies and power levels in response to user selection | Sanjay Gupta | 1990-05-08 |
| 4908857 | Isolated drive circuit | Sanjay Gupta | 1990-03-13 |
| 4685130 | Subscriber line circuit having an improved loop current supply circuit | — | 1987-08-04 |
| 4677667 | Subscriber line circuit having improved AC impedance matching | — | 1987-06-30 |
| 4674117 | Subscriber line circuit having an improved offhook supervision circuit | — | 1987-06-16 |
| 4201897 | Ringing voltage transfer circuit | John P. Dorth, Lloyd A. Tarr | 1980-05-06 |
| 4186275 | Initial rate override circuit | — | 1980-01-29 |