Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8102242 | Autonomous interrogating transponder for direct communications with other transponders | David L. Acosta, James H. Swindell | 2012-01-24 |
| 7432802 | Autonomous interrogating transponder for direct communications with other transponders | David L. Acosta, James H. Swindell | 2008-10-07 |
| D501466 | Antenna with square-shaped center | — | 2005-02-01 |
| D501465 | Antenna with octagon-shaped center | — | 2005-02-01 |
| D493448 | Antenna with round-shaped center | — | 2004-07-27 |
| RE35361 | Expulsion of detrimental substance from theft-deterrent device | Dennis L. Hogan, John L. Lynch | 1996-10-29 |
| 5517179 | Signal-powered frequency-dividing transponder | — | 1996-05-14 |
| 5497639 | Non-cuttable device for attachment of shoplifting detection tag | — | 1996-03-12 |
| 5406262 | Adjusting magnetic bias field intensity in EAS presence detection system to enhance detection | Fred W. Herman, Ming-Ren Lian, Douglas A. Drew | 1995-04-11 |
| 5069047 | Release of pin-clutch mechanism in theft-deterrent device | John L. Lynch | 1991-12-03 |
| 5054172 | Expulsion of detrimental substance from theft-deterrent device | Dennis L. Hogan, John L. Lynch | 1991-10-08 |
| 5031287 | Detrimental-substance-containing theft-deterrent device | Carter W. Clarke, Jr. | 1991-07-16 |
| 5022244 | Pin-clutch mechanism for theft-deterrent device | — | 1991-06-11 |
| 5015953 | Magnetometer for detecting DC magnetic field variations | Lucian G. Ferguson | 1991-05-14 |
| 4727360 | Frequency-dividing transponder and use thereof in a presence detection system | Lucian G. Ferguson | 1988-02-23 |
| 4670740 | Portable, batteryless, frequency divider consisting of inductor and diode | Fred W. Herman | 1987-06-02 |
| 4654641 | Frequency divider with single resonant circuit and use thereof as a transponder in a presence detection system | Lucian G. Ferguson | 1987-03-31 |
| 4523356 | Ball clutch mechanism with two sets of balls in separate radial planes | — | 1985-06-18 |
| 4520362 | Polarization ratiometry object detection system and method | — | 1985-05-28 |
| 4481428 | Batteryless, portable, frequency divider useful as a transponder of electromagnetic radiation | — | 1984-11-06 |
| 4234823 | Ballast circuit for low pressure gas discharge lamp | — | 1980-11-18 |