Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6640453 | Clinometer | — | 2003-11-04 |
| 6212782 | Building line layout device | — | 2001-04-10 |
| 5606230 | Direct current drive system | Chauncey R. Drury | 1997-02-25 |
| 5601154 | Portable suspended roof scaffold system | — | 1997-02-11 |