Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885872 | Garage door operator with plastic drive belt | Scott M. Clark | 1989-12-12 |
| 4794731 | Twin sprocket garage door opener | Colin B. Willmott | 1989-01-03 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885872 | Garage door operator with plastic drive belt | Scott M. Clark | 1989-12-12 |
| 4794731 | Twin sprocket garage door opener | Colin B. Willmott | 1989-01-03 |