Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4833961 | Method, device and ammunition for dispersing rioters | — | 1989-05-30 |
| 4823610 | Device for and method of measuring tensile force in reinforcing member of reinforced concrete | — | 1989-04-25 |
| 4813804 | Method of attaching supporting element to structure, and supporting element therefor | — | 1989-03-21 |