Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6116140 | Telescoping system with multi-stage telescopic cylinder | Henry D. Barthalow | 2000-09-12 |
| 6029559 | Telescoping system with multiple single-stage telescopic cylinders | Henry D. Barthalow | 2000-02-29 |
| 5927520 | Electro-hydraulic operating system for extensible boom crane | Henry D. Barthalow, William E. Hull | 1999-07-27 |
| 5911239 | Metering valve | Henry D. Barthalow, William E. Hull | 1999-06-15 |