Issued Patents All Time
Showing 76–100 of 134 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5182693 | Magnetic disk | Keiji Koga, Jun Satoh, Akinori Nisizawa, Yasumichi Tokuoka | 1993-01-26 |
| 5160761 | Method for making a magnetic disk | Keiji Koga, Jun Satoh, Akinori Nisizawa, Yasumichi Tokuoka | 1992-11-03 |
| 5140486 | Magnetic recording and reproduction | Akinori Nisizawa, Jun Satoh, Keiji Koga, Yasumichi Tokuoka | 1992-08-18 |
| 5140513 | Switching regulated DC-DC converter using variable capacity diodes in the feedback circuit | — | 1992-08-18 |
| 5138593 | Vibration control for an optical pickup actuator driving device | — | 1992-08-11 |
| 5130214 | Method for producing electrophotographic photoreceptor and apparatus used therefor | Masaaki Yokoyama | 1992-07-14 |
| 5080971 | Magnetic recording medium | Masatoshi Nakayama, Toru Shimozawa, Kunihiro Ueda, Fumio Maruta | 1992-01-14 |
| 5069967 | Magnetic recording medium | Masatoshi Nakayama, Toru Shimozawa, Kunihiro Ueda, Fumio Maruta | 1991-12-03 |
| 5031221 | Dynamic loudspeaker driving apparatus | — | 1991-07-09 |
| 5027228 | Analog type magnetic recording and reproducing device with digital input/output coupling | — | 1991-06-25 |
| 5009281 | Acoustic apparatus | — | 1991-04-23 |
| 5009280 | Acoustic apparatus | — | 1991-04-23 |
| 5004764 | Composition for vibration damper, process for manufacture thereof, and vibration damper | Yohzoh Yamamoto, Shuichi Ishiwata, Kimio Hasegawa | 1991-04-02 |
| 4998157 | Ohmic contact to silicon substrate | Juri Kato, Masashi Ogita | 1991-03-05 |
| 4989187 | Acoustic apparatus | — | 1991-01-29 |
| 4987564 | Acoustic apparatus | — | 1991-01-22 |
| 4966929 | Composition having damping property, damping member, process for preparation of damping member and method of using damping member | Toru Tomoshige, Yasumasa Fujii, Youhei Suzuki, Yoshio Iida | 1990-10-30 |
| 4955236 | Method for observation of vibration mode | Hidehiko Saizyo | 1990-09-11 |
| 4908752 | DC-to-DC voltage-increasing power source | Eiichi Suzuki, Masao Noro | 1990-03-13 |
| 4889767 | Magnetic recording medium | Masatoshi Nakayama, Toru Shimozawa, Kunihiro Ueda, Fumio Maruta | 1989-12-26 |
| 4880687 | Magnetic recording medium | Masatoshi Nakayama, Toru Shimozawa, Kunihiro Ueda, Fumio Maruta | 1989-11-14 |
| 4816334 | Magnetic recording medium | Masatoshi Nakayama, Fumio Maruta, Kunihiro Ueda | 1989-03-28 |
| 4801823 | Sample hold circuit | — | 1989-01-31 |
| 4785257 | Power amplifier circuit for an audio circuit | — | 1988-11-15 |
| 4727335 | Gain-controlled amplifier | — | 1988-02-23 |