Issued Patents All Time
Showing 26–50 of 56 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6805782 | Compound layered type of sensing device for multiple measurement | Akio Tanaka, Toshitaka Saito, Keigo Mizutani | 2004-10-19 |
| 6589409 | Multilayered gas sensing element employable in an exhaust system of an internal combustion engine | Akio Tanaka, Toshitaka Saito, Keigo Mizutani | 2003-07-08 |
| 6329478 | Transition metal complex, process for producing the same, olefin polymerization catalyst containing the transition metal complex and process for producing olefin polymers | Hiroaki Katayama, Masaaki Nabika, Akio Imai, Tsuyoshi Watanabe, Hirofumi Johohji +2 more | 2001-12-11 |
| 6147943 | Information recording and/or reproducing method and apparatus in which a servo process of a light beam is interrupted between input/output control of data at predetermined periods | Yutaka Ogasawara, Hirotake Ando, Nobuyuki Tonegawa | 2000-11-14 |
| 6066704 | Transition metal complex, catalyst for olefin polymerization, and process for producing olefin polymers | Hiroaki Katayama, Akio Imai, Hidenori Hanaoka, Norio Kawamura | 2000-05-23 |
| 6049516 | Information recording and/or reproducing method and apparatus in which a servo process of a light beam is interrupted between input/output control of data at predetermined periods | Yutaka Ogasawara, Hirotake Ando, Nobuyuki Tonegawa | 2000-04-11 |
| 5949747 | Test recording method and optical information recording/reproducing apparatus for determining an optimum power of the light output from a light source in erasing pieces of information recorded on a land and groove of a recording medium | Takaaki Ashinuma | 1999-09-07 |
| 5825729 | Information recording and/or reproducing method and apparatus in which a servo process of a light beam is interrupted between input/output control of data at predetermined periods | Yutaka Ogasawara, Hirotake Ando, Nobuyuki Tonegawa | 1998-10-20 |
| 5815477 | Write test method for use in recording process for recording information by modulating the power of a laser light thereby forming a high-temperature state and a low-temperature state on a recording medium | Shunpei Kimura, Takaaki Ashinuma, Tsutomu Shiratori | 1998-09-29 |
| 5781222 | Optical information recording/reproducing apparatus supplying a smaller high-frequency current to a first semiconductor laser for generating a light beam to record information than to a second semiconductor laser for reproducing recorded information | Takeshi Yamawaki | 1998-07-14 |
| 5701280 | Optical information recording and/or reproducing apparatus in which a reproducing light beam is modulated with at least a 100% degree of modulation | — | 1997-12-23 |
| 5627813 | Optical information recording and/or reproducing apparatus and method with auto power control function for two light sources | — | 1997-05-06 |
| 5592456 | Information reproducing apparatus and method | Takaaki Ashinuma | 1997-01-07 |
| 5556998 | Transition metal complex, process for the preparation of the same, and asymmetric hydrogenation catalyst comprising the same | Takeshi Chiba, Hiroyuki Nohira, Hidemasa Takaya | 1996-09-17 |
| 5521269 | Spiropyran compounds and optically active spiropyran compounds and their use | — | 1996-05-28 |
| 5403702 | Crystals consisting of an indolinospirobenzopyran derivative | — | 1995-04-04 |
| 5342813 | Catalyst for polymerizing aromatic vinyl compound and process for producing polymer of aromatic vinyl compound | — | 1994-08-30 |
| 5320784 | Crystal comprising an indolinospirobenzothiopyran derivative and its ring opened isomer | — | 1994-06-14 |
| 5288592 | Transition metal-spirobenzopyran complex, a production process therefor and a photochromic material comprising the complex | — | 1994-02-22 |
| 5252742 | Spiropyran compounds | — | 1993-10-12 |
| 5241027 | Macromolecular spiropyran compounds | — | 1993-08-31 |
| 5236958 | Benzoselenazolino-vinylspiropyran compound | — | 1993-08-17 |
| 5171871 | Process for polymerizing an aromatic vinyl compound and a catalyst therefor | — | 1992-12-15 |
| 5100983 | Process for producing syndiotactic polymer of aromatic vinyl compounds | — | 1992-03-31 |
| 5087728 | Process for producing carboxylic acids and esters thereof | Hiroyuki Nohira, Hidemasa Takaya | 1992-02-11 |