Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11769992 | Hydraulic displacement mechanism and method of use | Michael Butler | 2023-09-26 |
| 11661715 | Manhole guard and attachable winch mount | Michael Butler | 2023-05-30 |
| 11349285 | Cut resistant knife | Michael Butler | 2022-05-31 |
| 10190273 | Manhole guard and attachable hoist device | Michael Butler | 2019-01-29 |