Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5428344 | Crane hoist safety deactivator | Donald A. Chambers | 1995-06-27 |
| 5343739 | Gantry crane collision avoidance device | — | 1994-09-06 |
| 5260688 | Crane hoist safety deactivator | Donald A. Chambers | 1993-11-09 |