Issued Patents All Time
Showing 26–32 of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5679386 | Optical disk formation member for making an optical disk substrate | Masahiro Birukawa, Yoshihiko Kudoh | 1997-10-21 |
| 5656370 | Optical recording medium | Masahiro Birukawa | 1997-08-12 |
| 5582891 | Optical disk substrate with land planes of uniform height | Masahiro Birukawa, Yoshihiko Kudoh | 1996-12-10 |
| 5565278 | Magneto-optical recording medium | Masahiro Birukawa, Hidetsugu Kawabata | 1996-10-15 |
| 5518826 | Magneto-optical recording medium and method of manufacturing same | Yoshihiko Kudoh, Hidetsugu Kawabata | 1996-05-21 |
| 5472758 | Optical recording medium for short-wavelength of laser beam and read/write/erase method using the medium | Masahiro Birukawa | 1995-12-05 |
| 4952295 | Method of producing a deposition film of composite material | Hidetsugu Kawabata, Yoshihiko Kudoh, Norio Miyatake, Masakazu Yamamoto | 1990-08-28 |