Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4853917 | Optical tracking apparatus with photodetector disposed outside part of the effective diameter of the lens system | Osamu Koyama, Kazuo Uzuki, Shigeru Aoi | 1989-08-01 |
| 4849952 | Magnetooptical information recording apparatus having intensified magnetic flux applying means | — | 1989-07-18 |
| 4843600 | Recording head for magneto-optical information recording apparatus | Yoshikazu Miyajima | 1989-06-27 |
| 4841407 | Magnetic field generator having a plurality of coils for generating magnetic field in substantially the same space and method of driving the same | Hisatoshi Baba, Naoki Imokawa | 1989-06-20 |