Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5227779 | Codable electronic devices | — | 1993-07-13 |
| 4514731 | Coded information arrangement | David Robson | 1985-04-30 |
| 4399437 | Coded information arrangement | David Robson | 1983-08-16 |
| 4260983 | Presence sensing detector and system for detecting a receiver/transmitter device affixed to an article | Keith B. Glanvill, John Reid | 1981-04-07 |