Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5216664 | Optically readable disc with a centering member fixed to a transparent substrate | Pieter D. Schuitmaker, Peter Janssen | 1993-06-01 |
| 4899329 | Optically readable disc with a centering member fixed to a transparent substrate | Pieter D. Schuitmaker, Peter Janssen | 1990-02-06 |