Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4845760 | Electro-acoustic transducer arranged within the handset of a telephone instrument | Kurt Schiller | 1989-07-04 |
| 4839921 | Telephone station comprising an optical display device | Kurt Schiller, Erwin Grassl | 1989-06-13 |
| 4819266 | Telephone device with means for changing the angle of inclination | Peter Kleine | 1989-04-04 |
| 4810066 | Cover for telecommunications equipment | Erwin Grassl | 1989-03-07 |