Issued Patents 2020
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |