Issued Patents All Time
Showing 1–25 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6034933 | Apparatus for recording and reproducing optical information on and from optical record medium | — | 2000-03-07 |
| 5774433 | Optical recording/reproducing apparatus using three count control signals for counting a number of tracks crossed by a light beam | — | 1998-06-30 |
| 5583836 | Optical recording/reproducing apparatus capable of multi-track access for simultaneous multitrack recording/reproduction | Mitsuo Oshiba, Takefumi Sakurada, Naoaki Tani, Takumi Sugaya | 1996-12-10 |
| 5568458 | Optical information recording and reproducing apparatus in which reproducing light is used to perform servo control having no offset at recording mode | Naoaki Tani, Takumi Sugaya, Mitsuo Oshiba, Takefumi Sakurada | 1996-10-22 |
| 5511051 | Optical recording/reproducing apparatus capable of multi-track access for simultaneous multirack recording/reproduction | Mitsuo Oshiba, Takefumi Sakurada, Naoaki Tani, Takumi Sugaya | 1996-04-23 |
| 5438563 | Optical information recording/reproducing device which simultaneously reproduces information from plural tracks and optical information recording/reproducing method | Mitsuo Oshiba, Takefumi Sakurada, Naoaki Tani, Takumi Sugaya | 1995-08-01 |
| 5425010 | Optical information recording/reproducing apparatus having photo detecting element disposed in a two-dimensional array | — | 1995-06-13 |
| 5402399 | Apparatus and method for reproducing information data from optical cards | Mitsuo Oshiba, Takefumi Sakurada, Naoaki Tani, Takumi Sugaya | 1995-03-28 |
| 5400308 | Optical information recording/reproducing device capable of recording information on a moving medium and reproducing information by using reproducing light beams | Takumi Sugaya, Mitsuo Oshiba, Takefumi Sakurada, Naoaki Tani | 1995-03-21 |
| 5398225 | Optical information recording/regenerating apparatus and track scanning method for an optical information recording/regenerating apparatus | Takumi Sugaya, Mitsuo Oshiba, Takefumi Sakurada, Naoaki Tani | 1995-03-14 |
| 5394385 | Optical information recording/reproducing apparatus for performing positioning of recording/reproducing spot by selection of pairs of photo detecting elements | Takefumi Sakurada, Naoaki Tani, Takumi Sugaya, Mitsuo Oshiba, Akira Shirai | 1995-02-28 |
| 5392268 | Optical recording/reproducing apparatus for reproducing information of multiple tracks capable of correcting uneven illumination of the multiple tracks | — | 1995-02-21 |
| 5298730 | Optical card apparatus in which retrial of locating operation of optical card is retried on another track at the time of loading the same | — | 1994-03-29 |
| 5293365 | Track control circuit for optical card recording/reproducing apparatus | — | 1994-03-08 |
| 5274615 | Method of accessing a card shaped recording medium | — | 1993-12-28 |
| 5257249 | Optical information recording reproducing apparatus for recording and reproducing information on a record medium and for generating track error signals | — | 1993-10-26 |
| 5228018 | Optical information recording/reproducing apparatus with tracking off-set correction | — | 1993-07-13 |
| 5184337 | Optical recording/reproducing apparatus having means for periodically supervising drive current supplied to actuator | — | 1993-02-02 |
| 5179267 | Data reading and/or writing apparatus of type using optical card | Akihiko Hashimoto, Toshihiro Kitahara, Hiroshi Hashi | 1993-01-12 |
| 5157644 | Optical card recording/reproducing apparatus | — | 1992-10-20 |
| 5115421 | Optical recording/reproducing apparatus | — | 1992-05-19 |
| 5091635 | Optical record medium including a data region, an identification region and a control data region, and a method of recording signals on the optical record medium | Yuichiro Akatsuka, Takayuki Abe, Akira Matsueda, Nagahiro Gocho | 1992-02-25 |
| 4962301 | Method of reciprocally recording data on card-like record medium for unidirectional reading | — | 1990-10-09 |
| 4924199 | Optical card for data storage for use in a data recording and retrieving apparatus | Akihiko Hashimoto, Toshihiro Kitahara, Hiroshi Hashi | 1990-05-08 |
| 4918415 | Data reading and/or writing apparatus for use with an optical card | Akihiko Hashimoto, Toshihiro Kitahara, Hiroshi Hashi | 1990-04-17 |