Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7202781 | Automatic watching system | David Henderson, Gordon Henderson | 2007-04-10 |
| 7151448 | Automatic watching system | David Henderson, Gordon Henderson | 2006-12-19 |
| 5203654 | Replaceable tang and tool combination | — | 1993-04-20 |