Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4840452 | Light wave conductor-sensor for tension | Helmut Federmann, Georg Noack | 1989-06-20 |
| 4840480 | Light conduit arrangement for monitoring a physical condition of a structural part | J. Peter Starke, Helmut Federmann | 1989-06-20 |