Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5335876 | Tape cassette lid-locking device | Osamu Shibazaki | 1994-08-09 |
| 5318826 | Information recording medium comprising a silver nalide light sensitive layer, and two superposed magnetic layers which differ in coercivity | Yasuhisa Yamauchi, Koichi Nagayasu | 1994-06-07 |
| 5294525 | Silver halide photographic light-sensitive material capable of magnetic-recording | Yasuhisa Yamauchi, Eiichi Ueda | 1994-03-15 |
| 5284716 | Magnetic recording medium | Yasushi Nakano, Noboru Koyama, Masahiro Umemura, Takemasa Namiki, Seiichi Tobisawa +2 more | 1994-02-08 |
| 5055349 | Magnetic recording medium | Yasuhisa Yamauchi | 1991-10-08 |
| 5041939 | Magnetic tape cassette with leaf-shaped spring door closure mechanism | Tsutomu Hiramoto, Masayuki Komeiji, Kimimoto Hirose, Hitoshi Okubo, Minoru Sato | 1991-08-20 |
| 5035856 | Magnetic recording medium | Noboru Koyama, Yasushi Nakano, Setsuko Kawahara, Takemasa Namiki, Shigetoshi Kawabe +1 more | 1991-07-30 |
| 4951167 | Magnetic tape cassette with improved front cover supporting mechanism | Tsutomu Hiramoto, Masayuki Komeiji, Kimimoto Hirose, Hitoshi Okubo, Minoru Sato | 1990-08-21 |
| 4832301 | Hanger | Tsutomu Hiramoto, Satoshi Fukasawa, Takeshi Kubodera, Kimimoto Hirose, Sohji Shinozaki | 1989-05-23 |
| 4761338 | Magnetic recording medium | Masao Asano, Kazumasa Matsumoto, Toshio Tsuji | 1988-08-02 |
| 4731292 | Magnetic recording medium | Kunitsuna Sasaki, Toshiaki Shibue, Kazumasa Matsumoto | 1988-03-15 |
| 4710427 | Process for treating magnetic metal power | Yasuhisa Yamauchi, Masao Asano, Hideyuki Anzai | 1987-12-01 |
| 4684572 | Magnetic recording medium | Masaji Nara, Shigeru Akutsu | 1987-08-04 |
| 4652496 | Magnetic recording medium | Masaji Nara, Shigeru Akutsu | 1987-03-24 |
| 4562117 | Magnetic recording medium and a process of fabricating such magnetic recording medium | Shozo Kikukawa | 1985-12-31 |
| 4555443 | Magnetic recording medium | Shozo Kikugawa | 1985-11-26 |
| 4399443 | Ink composition and method for ink jet recording | Yoshio Takeuchi, Yoshiaki Kimura | 1983-08-16 |