Issued Patents All Time
Showing 25 most recent of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9991782 | Control of conversion ratios of a power source block and bidirectional active filter | Edward P. Coleman, Jonathan M. Audy, David Fisher | 2018-06-05 |
| 9716433 | Control of conversion ratios of a power source block and a bidirectional active filter | Edward P. Coleman, Jonathan M. Audy, David Fisher | 2017-07-25 |
| 8816765 | Coupled inductor and calibrated complementary low noise amplifiers | — | 2014-08-26 |
| 8620252 | Ultra low power, low noise switched capacitor radio frequency mixer | — | 2013-12-31 |
| 8086209 | Method and apparatus for frequency mixing of radio frequency signals | — | 2011-12-27 |
| 8005447 | Method and apparatus for providing a dual-loop phase lock loop | — | 2011-08-23 |
| 7936850 | Method and apparatus for providing a digital automatic gain control (AGC) | Charles Abraham | 2011-05-03 |
| 6356602 | RF integrated circuit for downconverting a GPS signal | Chung Y. Lau, Reed A. Parker, Gary L. Wagner | 2002-03-12 |
| 6353796 | Vehicle tracker, mileage-time monitor and calibrator | John F. Schipper, James M. Janky, David J. Cowl | 2002-03-05 |
| 6122506 | GSM cellular telephone and GPS receiver combination | Chung Y. Lau, Reed A. Parker | 2000-09-19 |
| 6115595 | Integrated circuit using a power supply input for digital logic | Chung Y. Lau | 2000-09-05 |
| 6088650 | Vehicle tracker, mileage-time monitor and calibrator | John F. Schipper, James M. Janky, David J. Cowl | 2000-07-11 |
| 5987378 | Vehicle tracker mileage-time monitor and calibrator | John F. Schipper, James M. Janky, David J. Cowl | 1999-11-16 |
| 5883596 | GPS timing receiver using oversampling | — | 1999-03-16 |
| 5831577 | GPS/radio antenna combination | Mark Edward Nichols | 1998-11-03 |
| 5764172 | Hybrid DAC suitable for use in a GPS receiver | — | 1998-06-09 |
| 5748144 | GPS timing receiver using oversampling | — | 1998-05-05 |
| 5719587 | Dual frequency vertical antenna | — | 1998-02-17 |
| 5691726 | GPS/radio antenna combination | Mark Edward Nichols | 1997-11-25 |
| 5654717 | GPS/radio antenna combination | Mark Edward Nichols | 1997-08-05 |
| 5650785 | Low power GPS receiver | — | 1997-07-22 |
| 5629708 | GPS receiver having an initial adjustment for correcting for drift in reference frequency | Dominic Gerard Farmer, Chung Y. Lau | 1997-05-13 |
| 5604506 | Dual frequency vertical antenna | — | 1997-02-18 |
| 5594453 | GPS receiver having a rapid acquisition of GPS satellite signals | Dominic Gerard Farmer, Chung Y. Lau | 1997-01-14 |
| 5592173 | GPS receiver having a low power standby mode | Chung Y. Lau, Dominic Gerard Farmer, Kreg Martin | 1997-01-07 |