Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7344760 | Wear-resistant electrically conductive body | Kenneth H. Heffner, David M. File | 2008-03-18 |
| 6733408 | Belt tension/drive for pinch roller system | — | 2004-05-11 |
| 5988946 | Multiple bladder flood control system | — | 1999-11-23 |
| 5098057 | Shaft anchoring apparatus | Carl H. Gran, Arthur A. Smith | 1992-03-24 |
| 4767162 | Blade control system for concrete cutting apparatus | — | 1988-08-30 |