Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887292 | Electronic lock system with improved data dissemination | Philip D. Barrett, Walter G. Henderson | 1989-12-12 |
| 4831851 | Combination/electronic lock system | — | 1989-05-23 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887292 | Electronic lock system with improved data dissemination | Philip D. Barrett, Walter G. Henderson | 1989-12-12 |
| 4831851 | Combination/electronic lock system | — | 1989-05-23 |