Issued Patents All Time
Showing 1–25 of 70 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7224759 | Methods and apparatus for delay free phase shifting in correcting PLL phase offset | — | 2007-05-29 |
| 6982538 | Methods and apparatus for generating a sinusoidal motor drive signal for a MEMS gyroscope | — | 2006-01-03 |
| 6907441 | Square root extractor | — | 2005-06-14 |
| 6904443 | Harmonic-series filter | — | 2005-06-07 |
| 6810124 | Adaptive resonance canceller apparatus | — | 2004-10-26 |
| 6725169 | Methods and apparatus for automatic gain control | Leroy O. Thielman | 2004-04-20 |
| 6694125 | System and method for extending the range of a base unit | Warner B. Andrews, Jr., P. Michael Henderson, James W. Johnston, Kenneth S. Walley | 2004-02-17 |
| 6691550 | Estimator for determining resonant frequency and Q | — | 2004-02-17 |
| 6686755 | Methods for wireless testing of integrated circuits | Kenneth S. Walley, James W. Johnston, P. Michael Henderson, Kelly H. Hale, Warner B. Andrews, Jr. +1 more | 2004-02-03 |
| 6611602 | Adaptive removal of resonance-induced noise | Jeffrey P. Woodard, Michael Alan Soderstrand, Karl E. Nelson, Phong Vu Nguyen Dao | 2003-08-26 |
| 6564636 | Wide band digital phase locked loop (PLL) with a half-frequency output | — | 2003-05-20 |
| 6531982 | Field unit for use in a GPS system | Kenneth S. Walley, James W. Johnston, P. Michael Henderson, Kelly H. Hale, Warner B. Andrews, Jr. +1 more | 2003-03-11 |
| 6424441 | Method and apparatus for sensing an audio signal that is sensitive to the audio signal and insensitive to background noise | Kenneth S. Walley, James W. Johnston, P. Michael Henderson, Kelly H. Hale, Warner B. Andrews, Jr. +1 more | 2002-07-23 |
| 6400968 | System and method for extending the range of a base unit | Warner B. Andrews, Jr., P. Michael Henderson, James W. Johnston, Kenneth S. Walley | 2002-06-04 |
| 6396881 | Minimum-delay frequency-shift-compensating complex demodulator with arbitrary phase adjustment | — | 2002-05-28 |
| 6353413 | Multi-function universal controller and locator systems | Kenneth S. Walley, James W. Johnston, P. Michael Henderson, Kelly H. Hale, Warner B. Andrews, Jr. +1 more | 2002-03-05 |
| 6331782 | Method and apparatus for wireless testing of integrated circuits | Kenneth S. Walley, James W. Johnston, P. Michael Henderson, Kelly H. Hale, Warner B. Andrews, Jr. +1 more | 2001-12-18 |
| 6192134 | System and method for a monolithic directional microphone array | Kenneth S. Walley, James W. Johnston, P. Michael Henderson, Kelly H. Hale, Warner B. Andrews, Jr. +1 more | 2001-02-20 |
| 6184696 | Use of converging beams for transmitting electromagnetic energy to power devices for die testing | Kenneth S. Walley, James W. Johnston, P. Michael Henderson, Kelly H. Hale, Warner B. Andrews, Jr. +1 more | 2001-02-06 |
| 6072882 | Method and apparatus for sensing an audio signal that is sensitive to the audio signal and insensitive to background noise | Kenneth S. Walley, James W. Johnston, P. Michael Henderson, Kelly H. Hale, Warner B. Andrews, Jr. +1 more | 2000-06-06 |
| 6037743 | Battery charger and power source employing an environmental energy extractor and a method related thereto | James W. Johnston, P. Michael Henderson, Warner B. Andrews, Jr., Kenneth S. Walley, Jonathan I. Siann | 2000-03-14 |
| 5960091 | Adaptive removal of resonance-induced noise | Jeffrey P. Woodard, Michael Alan Soderstrand, Karl E. Nelson, Phong Vu Nguyen Dao | 1999-09-28 |
| 5893054 | Amplitude detection and automatic gain control of a sparsely sampled sinusoid by computation including a hilbert transform | — | 1999-04-06 |
| 5808924 | Decimating IIR filter | — | 1998-09-15 |
| 5764705 | Adaptive phase shift adjuster for resonator | — | 1998-06-09 |