Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5687639 | Rotating variable height clamping device | Norman A. Planck, Jr., Eduard Hendrikus Johannes Damhuis | 1997-11-18 |
| 5676047 | Rotating variable height clamping device | Norman A. Planck, Jr., Eduard Hendrikus Johannes Damhuis | 1997-10-14 |