Issued Patents All Time
Showing 26–35 of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6280489 | Polishing compositions | Hiromitsu Okuyama, Mitsuo Otohata | 2001-08-28 |
| 6269420 | Information recording/reproducing apparatus reducing disk access frequency to file management area and sharply accelerating record processing and reproduction processing | — | 2001-07-31 |
| 6126515 | Liquid slurry containing polyhedral monocrystalline alumina | Jun Watanabe | 2000-10-03 |
| 5568464 | Semiconductor laser driving apparatus utilizing three current sources to control read and write light power | — | 1996-10-22 |
| 5544136 | Digital servo system for obtaining by calculation a control signal corresponding to a desired value on the basis of the change of a control signal and a controlled signal | — | 1996-08-06 |
| 5473589 | Information recording/reproducing apparatus capable of performing ready operation in response to external loading request | — | 1995-12-05 |
| 5392269 | Medium replaceable recording and reproducing apparatus in which full initialization is not needed depending on the inserted state of the medium | — | 1995-02-21 |
| 5355632 | Apparatus for texture processing of magnetic disk | — | 1994-10-18 |
| 5048002 | Photodisc apparatus with means for canceling offset of tracking servo loop | Shoji Yoshikawa | 1991-09-10 |
| 5014256 | Photodisc apparatus with gain control of tracking servo loop | Shoji Yoshikawa | 1991-05-07 |