Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4868583 | Method for fashioning ink channels in a write head for a dot-matrix ink printer means | Karl-Heinz Dreinhoff | 1989-09-19 |
| 4864534 | Apparatus and method for entering setting commands in a computer-controlled interlocking system | Jurgen Kehrer | 1989-09-05 |