Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4858539 | Rotational switching apparatus with separately driven stitching head | — | 1989-08-22 |
| 4850520 | Cylindrical stitching device for binding single sheets | Claus-Dieter Redmer, Lutz Richter | 1989-07-25 |