Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4913572 | Reloadable ribbon cassette for typewriters or office machines of similar construction | Rolf Behrens, Hermann Jendricke, Manfred Sauer, Klaus-Dieter Frerichs, Alfred Keiter +2 more | 1990-04-03 |
| 4780010 | Ribbon spools for a reloadable cassette for a typewriter or similar office machine | Rolf Behrens, Hermann Jendricke, Manfred Sauer, Klaus-Dieter Frerichs, Alfred Keiter +2 more | 1988-10-25 |