Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874004 | Coaxial cigarette | Horst Borowski, Erwin Kausch, Erhard Rittershaus, Gert Rudolph | 1989-10-17 |
| 4853666 | Push button for an inductive value input keyboard | Hugo Fesenmeier, Oskar Zumkeller, Hans Grieser | 1989-08-01 |
| 4825208 | Method for flow control of data within a meshed data network | Wilhelm Mueller | 1989-04-25 |