| 7696881 |
RFID systems and methods employing infrared localization |
David G. Worthy |
2010-04-13 |
| 7486189 |
RFID systems and methods employing infrared localization |
David G. Worthy |
2009-02-03 |
| 7292628 |
Identification system for monitoring the presence / absence of members of a defined set |
Ralph J. Koerner |
2007-11-06 |
| 7049933 |
Identification device detection using multiple signal combination |
— |
2006-05-23 |
| 6611556 |
Identification system for monitoring the presence/absence of members of a defined set |
Ralph J. Koerner |
2003-08-26 |
| 6552661 |
Zone based radio frequency identification |
Roc Lastinger, John J. Coulthard |
2003-04-22 |
| 6326759 |
Ball joint gimbal system |
Donald G. Quist, William S. Wight, Carl M. Zorzi |
2001-12-04 |
| 5785048 |
Inhaler device with means for assessing its depletion level |
— |
1998-07-28 |
| 5519318 |
Triaxial magnetic heading sensing apparatus having magnetaresistors and nulling coils |
Anthony E. Lifur, Michael J. Wall |
1996-05-21 |
| 5066952 |
Non-linear data conversion system for dynamic range digital signal processing |
— |
1991-11-19 |
| 4325052 |
Trailer light connection system |
— |
1982-04-13 |