Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871620 | Typewriter ribbon having a thin support and a transferable mass, for typing on varied surfaces | Wolfhard Rutz | 1989-10-03 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871620 | Typewriter ribbon having a thin support and a transferable mass, for typing on varied surfaces | Wolfhard Rutz | 1989-10-03 |