Issued Patents All Time
Showing 1–25 of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5806388 | Process for manufacturing optical recording medium | — | 1998-09-15 |
| 5776575 | Information recording medium and process for production thereof | Mizuho Hiraoka | 1998-07-07 |
| 5744792 | Hybrid information recording medium | Mizuho Hiraoka | 1998-04-28 |
| 5682375 | Information recording medium and method for recording and reproducing thereof | — | 1997-10-28 |
| 5578184 | Patterning process, process for producing optical recording medium, and process for producing color filter | Mizuho Hiraoka, Kazumi Nagano, Takaya Yano, Hiroshi Tanabe | 1996-11-26 |
| 5503889 | Optical recording medium and production thereof | — | 1996-04-02 |
| 5489082 | Reproducible molding die having a removable cleaning layer | Mizuho Hiraoka, Tomoyuki Tamura, Tetsuya Satoh | 1996-02-06 |
| 5447767 | Optical recording medium, production thereof, substrate for optical recording medium, and production thereof | Hiroshi Tanabe, Mizuho Hiraoka, Kazumi Nagano, Takaya Yano | 1995-09-05 |
| 5423671 | Apparatus for producing a substrate sheet for an optical recording medium | — | 1995-06-13 |
| 5389313 | Method of producing a molding die for an information recording medium | Tetsuya Satoh, Mizuho Hiraoka, Tomoyuki Tamura | 1995-02-14 |
| 5344304 | Mold for molding of substrate for information recording medium | Tomoyuki Tamura, Mizuho Hiraoka, Tetsuya Sato | 1994-09-06 |
| 5249176 | Optical recording medium, process for preparing the same and its optical recording and reproducing system | — | 1993-09-28 |
| 5234633 | Cast molding die and process for producing information recording medium using the same | Tetsuya Satoh, Mizuho Hiraoka, Tomoyuki Tamura | 1993-08-10 |
| 5216665 | Information recording medium | — | 1993-06-01 |
| 5174937 | Method for molding of substrate for information recording medium and method for preparing substrate for information recording medium | Tomoyuki Tamura, Mizuho Hiraoka, Tetsuya Sato | 1992-12-29 |
| 5173391 | Optical recording medium | Mizuho Hiraoko | 1992-12-22 |
| 5085925 | Optical recording medium | Mizuho Hiraoka | 1992-02-04 |
| 5075060 | Process for producing a substrate sheet for an optical recording medium | — | 1991-12-24 |
| 5073101 | Information recording medium, production process and molding die for substrate therefor | Mizuho Hiraoka, Tomoyuki Tamura, Tetsuya Satoh | 1991-12-17 |
| 5026623 | Optical recording medium | Mizuho Hiraoka, Yoshihiro Ogawa, Hitoshi Yoshino, Sachiko Ichikawa, Seijiro Kato | 1991-06-25 |
| 4965153 | Optical recording medium | Mizuho Hiraoka, Sachiko Ichikawa, Hitoshi Yoshino, Yoshihiro Ogawa | 1990-10-23 |
| 4956214 | Information recording medium, production process and molding die for substrate therefor | Mizuho Hiraoka, Tomoyuki Tamura, Tetsuya Satoh | 1990-09-11 |
| 4925733 | Magnetic recording medium | Mizuho Hiraoka | 1990-05-15 |
| 4911733 | Process for fabricating color filters | Kazuya Matsumoto, Hisashi Nakatsui | 1990-03-27 |
| 4876042 | Molding processing using a reproducible molding die | Mizuho Hiraoka, Tomoyuki Tamura, Tetsuya Satoh | 1989-10-24 |