Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4440514 | Adjustable ribbon feed rates dependent upon ribbon type for ink ribbon cassettes | Alfred Keiter, Wolfgang Mudder | 1984-04-03 |
| 4431324 | Sound damping ribbon cartridge for a typewriter or similar office machine | Alfred Keiter | 1984-02-14 |