Issued Patents All Time
Showing 51–73 of 73 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6466650 | Telecom service identification transponder apparatus and technique | Jonathan H. Fischer, Lane A. Smith | 2002-10-15 |
| 6421430 | Line powered DAA with single ended feedback | Keith Eugene Hollenbach, Steven B. Witmer | 2002-07-16 |
| 6418220 | Extended feedback circuit employing capacitive coupling and sampled data filters | Jonathan H. Fischer, Keith Eugene Hollenbach, Steven B. Witmer | 2002-07-09 |
| 6404780 | Synchronizing data transfer protocol across high voltage interface | Lane A. Smith, Tony S. El-Kik | 2002-06-11 |
| 6396877 | Method and apparatus for combining serial data with a clock signal | Keith Eugene Hollenbach, Steven B. Witmer | 2002-05-28 |
| 6389110 | Telecom service identification resonator apparatus and technique | Jonathan H. Fischer, Lane A. Smith | 2002-05-14 |
| 6275581 | Extended feedback circuit employing capacitive coupling and sampled data filters | Jonathon Fischer, Keith Eugene Hollenbach, Steven B. Witmer | 2001-08-14 |
| 6269103 | High speed data interface using TDM serial bus | — | 2001-07-31 |
| 6263075 | Interrupt mechanism using TDM serial interface | Jalil Fadavi-Ardekani | 2001-07-17 |
| 6263304 | Simplified digitization of PC beep signal for audio codec | Jonathan H. Fischer | 2001-07-17 |
| 6215429 | Distributed gain for audio codec | Jonathan H. Fischer, Lane A. Smith, Paul D. Hendricks, James M. Little | 2001-04-10 |
| 6205218 | Extended feedback circuit for impedance matching and voltage isolation | Jonathan H. Fischer | 2001-03-20 |
| 6205219 | Call related information reception using sigma/delta modulation | Keith Eugene Hollenbach, Steven B. Witmer | 2001-03-20 |
| 6198944 | Method for telephone line interlock and cellular interconnect | Keith Eugene Hollenbach, Steven B. Witmer | 2001-03-06 |
| 6169762 | Interface devices providing electrical isolation | Milton L. Embree, Jonathan H. Fischer, Robert F. Lee | 2001-01-02 |
| 5912513 | Method and apparatus for reducing power dissipation in DC termination circuit | Keith Eugene Hollenbach, Steven B. Witmer | 1999-06-15 |
| 5877565 | Communication card with telephone line interlock and cellular interconnect | Keith Eugene Hollenbach, Steven B. Witmer | 1999-03-02 |
| 5528685 | Transformerless hybrid circuit | Donald Thomas Cwynar | 1996-06-18 |
| 5528686 | Transformerless hybrid circuit having direct powered line-side amplifiers | Donald Thomas Cwynar | 1996-06-18 |
| 5499923 | Communication card with extendible, rotatable coupling | James L. Archibald | 1996-03-19 |
| 5457601 | Credit card-sized modem with modular DAA | Thomas Georgopulos | 1995-10-10 |
| 5311578 | Technique for automatic identification of a remote modem | Gordon Bremer, Kurt Holmquist, Kenneth Martinez | 1994-05-10 |
| 5280526 | Transformer-less hybrid circuit | — | 1994-01-18 |