Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861177 | Reloadable ribbon cassette system | Hans-Peter Heins, Alfred Keiter | 1989-08-29 |
| 4854755 | Reloadable ribbon cassette system | Heinz Lange, Hans-Peter Heins | 1989-08-08 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861177 | Reloadable ribbon cassette system | Hans-Peter Heins, Alfred Keiter | 1989-08-29 |
| 4854755 | Reloadable ribbon cassette system | Heinz Lange, Hans-Peter Heins | 1989-08-08 |