Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12091072 | Powered lifting hand truck apparatus, system, and method | Michael Casey | 2024-09-17 |
| 9302689 | Hand truck | David Simonelli, Michael O'Hare, David W. Beckstrom, Albert V. Yannella | 2016-04-05 |
| 7712582 | Lifting device and method | Robert R. Hellman, Jr. | 2010-05-11 |
| 5636816 | Universal air conditioner mounting bracket and method | Robert R. Hellman, Jr. | 1997-06-10 |