Issued Patents All Time
Showing 26–46 of 46 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6942481 | Disk production apparatus and disk produced by disk production apparatus | Takayuki Onizawa, Shinji Ohta | 2005-09-13 |
| 6873595 | Information recording medium having parallel grooves with alternating convex-concave sections | Tetsuya Kondo | 2005-03-29 |
| 6815032 | Optical disc | Tetsuya Kondo, Takeo Kojima | 2004-11-09 |
| 6693873 | Information recording medium having parallel grooves with alternating convex-concave sections | Tetsuya Kondo | 2004-02-17 |
| 6676791 | Multilayered optical information-recording media and process for manufacture thereof | Tetsuya Kondo | 2004-01-13 |
| 6279959 | Optical discs, producing methods and production apparatus of the optical discs | — | 2001-08-28 |
| 6168207 | Optical discs, producing methods and production apparatus of the optical discs | — | 2001-01-02 |
| 6154442 | Multilayered optical information-recording media laminated with thermal plastic resin sheets and process for manufacturing thereof | Tetsuya Kondo | 2000-11-28 |
| 6083667 | Optical recording medium | Kanji Kayanuma | 2000-07-04 |
| 6038208 | Information recording disc recorded with signals at two different recording densities | Juichi Shikunami, Makoto Itonaga | 2000-03-14 |
| 5883877 | Optical disk having a high density recording layer and a low density recording layer | — | 1999-03-16 |
| 5781526 | Optical recording medium having a disc with deformed pits | Kanji Kayanuma | 1998-07-14 |
| 5696754 | Optical disk having a high-density recording layer and a low density recording layer | — | 1997-12-09 |
| 5617408 | Optical recording medium having a disc with deformed pits | Kanji Kayanuma | 1997-04-01 |
| 5078947 | Method and apparatus for the fabrication of optical record media such as a digital audio disc | Tetsuya Kondo | 1992-01-07 |
| 5047445 | Electroconductive polymeric material | — | 1991-09-10 |
| 4827466 | Information signal recording medium electrostatic capacitance type | — | 1989-05-02 |
| 4776935 | High density record including carbon black particles purified by electrolysis | Toshikazu Goshima, Kazuhira Namikawa, Toshiaki Hamaguchi, Mutsuaki Nakamura | 1988-10-11 |
| 4621007 | Information signal recording medium | Hiroshi Nakajima, Yoshihito Nakane, Toshikazu Goshima, Osamu Narita, Fuminari Suzuki | 1986-11-04 |
| 4578048 | Slidable type constant velocity universal joint | Seiichi Hirai, Nobuyuki Otsuka | 1986-03-25 |
| 4351747 | Information signal record medium of the capacitance type | Kazumichi Miyamoto, Takao Okuda, Mamoru Nakamura, Takaharu Abe | 1982-09-28 |