Issued Patents 1994
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5371721 | Method and apparatus for writing and reading a magneto-optical record carrier | Franciscus J. A. M. Greidanus, Johannes H. M. Spruit | 1994-12-06 |
| 5321682 | Method of and device for recording information on a record carrier having a recording layer which, when heated, undergoes an optically detectable change | Johannes H. M. Spruit, Wilhelmus H. A. M. Bardoel | 1994-06-14 |
| 5307328 | Magneto-optical scanning device with small coil | Petrus A. M. Van Grinsven, Wilfred A. M. Snijders, Johannes H. M. Spruit | 1994-04-26 |
| 5282095 | Direct over-write magneto-optical recording medium having multiple recording layers, and method of recording new information by directly overwriting pre-existing recorded information on such medium | Johannes H. M. Spruit | 1994-01-25 |