Issued Patents 1989
Showing 1–1 of 1 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 |