Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885919 | Sliding shackle padlock | Robert Loughlin | 1989-12-12 |
| 4848115 | Electronic locking system and key therefor | Bruce A. Clarkson, Ronald J. Frere, William Taylor, Peter Mongeau | 1989-07-18 |
| 4835996 | Tapered shackle padlock | Robert Loughlin | 1989-06-06 |