Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4862395 | Data display instrument for a bicycle | Rainer Fey, Gerhard Dumbser | 1989-08-29 |
| 4820979 | Electronic instrument unit for use on a bicycle having a signal receiver on both sides of the unit | Hans J. Schwerdhofer, Johannes Jager, Richard Gerstner | 1989-04-11 |
| 4800634 | Method of manufacturing a bicycle hub sleeve | Richard Gerstner, Werner Seybold, Werner Steuer | 1989-01-31 |