Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4884188 | Magnetic roller means with stationary magnetic knife blade for use in printing devices | Ronald Berkhout, Johannes G. V. van Stiphout, Antoon L. Hoep, Berend J. Knapen | 1989-11-28 |