Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4836031 | Method and apparatus for measuring deformations of test samples in testing machines | Ralf Jatho, Guenter Keller | 1989-06-06 |
| 4821579 | Apparatus for clamping a test sample in a testing machine | Peter Gernhart, Guenter Keller, Andreas Pohl | 1989-04-18 |