Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4849958 | System for recording/reading information on/from a disc, comprising a disc cassette and an apparatus | Marcelles B. M. Douwes, Rudolf J. G. A. van der Hoorn, Cornelis Ouwerkerk | 1989-07-18 |
| 4440982 | Hearing aid | Johannes M. G. M. Kaanders, Antoon F. Smerecnik | 1984-04-03 |