Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4340869 | Amplifier for use in a line circuit | — | 1982-07-20 |
| 4319092 | Current detection circuit arrangement for an automatic telephone exchange | Adrianus W. M. van den Enden | 1982-03-09 |