Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6609402 | Electronic key assembly with spring loaded data pin and contact | Brian David Blankenship, Alan Doerr | 2003-08-26 |
| 6591644 | Ball bearing cylinder plug and key retention | Alan Doerr, Cheryl Kay Koskela | 2003-07-15 |
| 6553800 | Side bar plunger and solenoid cylinder locking mechanism | Alan Doerr, Cheryl Kay Koskela | 2003-04-29 |