Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 4299583 | Hydraulic belt tensioner construction | Derald H. Kraft | 1981-11-10 | $217,000 |
| 4270906 | Belt tensioner construction | Derald H. Kraft | 1981-06-02 | $599,000 |