Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847542 | Automatic garage door operator with remote load control | Brian Martel, James Scott Murray | 1989-07-11 |
| 4808995 | Accessory-expandable, radio-controlled, door operator with multiple security levels | Dean C. Duhame | 1989-02-28 |