Issued Patents All Time
Showing 26–40 of 40 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5661612 | Magnetic head driving device and magnetooptical recording apparatus | Koyo Hasegawa, Makoto Hiramatsu | 1997-08-26 |
| 5627804 | Magneto-optical recording apparartus including a magnetic head having a core composed of a single crystal ferrite material | — | 1997-05-06 |
| 5615183 | Magnetic head used in magnetooptical recording | — | 1997-03-25 |
| 5586091 | Magnetooptical recording apparatus including a control circuit for driving a switch element between on and off states in accordance with an error detection | Makoto Hiramatsu | 1996-12-17 |
| 5579293 | Magnetic head driving circuit for controlling switching operations in a magnetooptical recording apparatus | — | 1996-11-26 |
| 5574702 | Magnetic head current control circuit for use in a magnetic head drive device, and magnetic/magnetooptical recording apparatus using the same | — | 1996-11-12 |
| 5563853 | Magneto-optical recording apparatus that compensates for magnetic fields leaking from an objective lens actuator and a linear motor | — | 1996-10-08 |
| 5559763 | Magnetic head driving device and magnetooptical recording apparatus with acceleration coil for shortening current inversion time | — | 1996-09-24 |
| 5550796 | Magnetic head and magneto-optical recording apparatus | — | 1996-08-27 |
| 5523986 | Magnetic head for magnetooptical recording and method for producing the same | — | 1996-06-04 |
| 5485433 | Information recording method and apparatus for determining whether recording has been correctly performed | Seiichiro Satomura, Katuya Yamazaki | 1996-01-16 |
| 5434831 | Magneto-optical recording apparatus capable of both magnetic modulation and light modulation recording | Koyo Hasegawa | 1995-07-18 |
| 5377055 | Circuit apparatus for driving a magnetic head | — | 1994-12-27 |
| 4707733 | Information signal recording disc comprising a connected region formed between parallel program recorded and single program recorded regions, and reproducing apparatus therefor | Tatsuya Shinyagaito, Terumasa Kuramoto, Toyotaka Machida, Kikuji Saito, Shunichi Shichijo +3 more | 1987-11-17 |
| 4695904 | Information signal recording disc recorded with an end signal for selectively preventing unwanted access to predetermined recorded information and disc reproducing apparatus therefor | Tatsuya Shinyagaito, Terumasa Kuramoto, Toyotaka Machida, Kikuji Saito, Shunichi Shichijo +3 more | 1987-09-22 |