Issued Patents 1982
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4366346 | Artificial reverberation apparatus | Eise C. Dijkmans, by Friedrich J. de Haan, administrator | 1982-12-28 |
| 4361727 | Sound reproducing arrangement for artificial reverberation | by Friedrich J. de Haan, administrator | 1982-11-30 |
| 4352954 | Artificial reverberation apparatus for audio frequency signals | by Friedrich J. de Haan, administrator | 1982-10-05 |
| 4321552 | Amplifier comprising a first and a second amplifier element | Gerardus A. van Maanen, Henricus G. J. M. Kockelmans | 1982-03-23 |