Issued Patents All Time
Showing 1–25 of 25 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6160490 | Apparatus for improving the battery life of a selective call receiver | Edgar H. Callaway, Jr., George W. Smoot | 2000-12-12 |
| 5744984 | Driver circuit providing controllable battery overload protection | George Drapac, Keith Jackoski, Paul J. Godfrey | 1998-04-28 |
| 5740524 | Feed-forward RSSI assisted radio frequency amplifier power control | Walter J. Grandfield, Wei Tan | 1998-04-14 |
| 5678223 | Method and apparatus for an automatic frequency control receiver | Edgar H. Callaway, Jr., Frederick Loring Kampe, James David Hughes | 1997-10-14 |
| 5649020 | Electronic driver for an electromagnetic resonant transducer | George McClurg, Charles W. Mooney, John M. McKee | 1997-07-15 |
| 5606731 | Zerox-IF receiver with tracking second local oscillator and demodulator phase locked loop oscillator | Vance H. Peterson, Edgar H. Callaway, Jr. | 1997-02-25 |
| 5604926 | Phase locked loop circuit current mode feedback | Vance H. Peterson, Edgar H. Callaway, Jr. | 1997-02-18 |
| 5585749 | High current driver providing battery overload protection | David H. Overton | 1996-12-17 |
| 5555452 | Peak and valley signal measuring circuit using single digital-to-analog converter | Edgar H. Callaway, Jr., James David Hughes | 1996-09-10 |
| 5471665 | Differential DC offset compensation circuit | James David Hughes | 1995-11-28 |
| 5463306 | Apparatus for detecting completion of energy transfer in an inductive DC to DC converter | James E. Berry, Barry W. Herold, Kevin L. McLaughlin, Margaret Graham-Meighan | 1995-10-31 |
| 5436594 | Fully differential transconductance amplifier with common-mode output voltage stabilization | James David Hughes | 1995-07-25 |
| 5252964 | Non-contact pager programming system and a pager for use therewith | William Tan, Pha Nguyen, Pamela A. Rakolta, Silvia M. Viteri | 1993-10-12 |
| 5125112 | Temperature compensated current source | Brian Patrick Lenhart, Jr. | 1992-06-23 |
| 5028861 | Strobed DC-DC converter with current regulation | David H. Overton | 1991-07-02 |
| 4982141 | Driver circuit for piezoelectric transducer and electroluminescent lamp | Silvia M. Viteri, David H. Overton | 1991-01-01 |
| 4961006 | Inductively loaded switching transistor circuit | David H. Overton | 1990-10-02 |
| 4929851 | Data limiter for a radio pager | — | 1990-05-29 |
| 4929910 | Low current amplifier with controlled hysteresis | David H. Overton | 1990-05-29 |
| 4908523 | Electronic circuit with power drain control | Gregory O. Snowden, Joan S. DeLuca | 1990-03-13 |
| 4866261 | Data limiter having current controlled response time | — | 1989-09-12 |
| 4845485 | Combined radio pager/timepiece apparatus with receiver desensitization protection | — | 1989-07-04 |
| 4843343 | Enhanced Q current mode active filter | — | 1989-06-27 |
| 4590394 | Signal processing circuit with voltage clamped input | — | 1986-05-20 |
| 4340868 | Current mode biquadratic active filter | — | 1982-07-20 |