Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7014903 | Optical recording medium | Hiroshi Takasaki, Tsutomu Tsutsumi, Masanori Shibahara | 2006-03-21 |
| 6921568 | Optical recording medium | Hiroyasu Inoue, Hiroshi Takasaki, Hideki Hirata | 2005-07-26 |
| 6843883 | Vacuum processing apparatus and method for producing an object to be processed | Masanori Kosuda, Yoshihisa TAMAGAWA | 2005-01-18 |
| 6835434 | Method for manufacturing disc-shaped optical recording medium and disc-shaped substrate for optical recording medium | Hiroshi Takasaki, Mamoru Usami | 2004-12-28 |
| 5571629 | Optical recording medium | Hajime Utsunomiya, Hideki Hirata, Kenji Uchiyama, Suguru Takayama | 1996-11-05 |
| 4902584 | Optical recording medium | Kenji Uchiyama, Hajime Utsunomiya, Suguru Takayama | 1990-02-20 |
| 4861656 | Optical recording medium | Kenji Uchiyama, Suguru Takayama | 1989-08-29 |
| 4849304 | Optical recording medium | Kenji Uchiyama, Hajime Utsunomiya, Suguru Takayama | 1989-07-18 |
| 4777082 | Optical magnetic recording medium | Takayoshi Kobuke, Suguru Takayama | 1988-10-11 |
| 4693934 | Magnetic recording medium for image recording | Masaharu Nishimatsu, Hiroyuki Arioka | 1987-09-15 |
| 4677023 | Magnetic recording medium | Osamu Hasegawa, Masaharu Nishimatsu | 1987-06-30 |
| 4666754 | Magnetic recording medium | Hiroyuki Arioka, Toshiaki Ide | 1987-05-19 |
| 4624892 | Magnetic recording medium | Hiroyuki Arioka, Toshiaki Ide | 1986-11-25 |