Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4924045 | Push button for a value input keyboard | Hugo Fesenmeieir | 1990-05-08 |
| 4853666 | Push button for an inductive value input keyboard | Hugo Fesenmeier, Werner Schneider, Hans Grieser | 1989-08-01 |