Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12241210 | Cordless electrically-powered concrete screed | Seth Nathaniel Ulmer, John Allen Armstrong | 2025-03-04 |
| 11725349 | Cordless electrically-powered concrete screed | Seth Nathaniel Ulmer, John Allen Armstrong | 2023-08-15 |
| 10844554 | Concrete screed power control linkage | Seth Nathaniel Ulmer, John Allen Armstrong | 2020-11-24 |
| 10844555 | Drive coupler for drill output shaft | Seth Nathaniel Ulmer, John Allen Armstrong | 2020-11-24 |
| 10837147 | Cordless electrically-powered concrete screed | Seth Nathaniel Ulmer, John Allen Armstrong | 2020-11-17 |