Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5809660 | Tree-trunk-diameter gauge | Walter Bitterlich, Gerlinde Ruthner | 1998-09-22 |
| 5067246 | Gauge for measuring tree-trunk growth and the like | Franz Adnrae, Peter Weber | 1991-11-26 |