Issued Patents All Time
Showing 26–46 of 46 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4442159 | Magnetic recording medium | Shin-ichiro Dezawa, Tatsuji Kitamoto | 1984-04-10 |
| 4439796 | Magnetic recording medium | Tatsuji Kitamoto | 1984-03-27 |
| 4439795 | Magnetic recording medium | Tatsuji Kitamoto | 1984-03-27 |
| 4414270 | Magnetic recording medium | Takahito Miyoshi, Toshimitu Okutu, Tatsuji Kitamoto, Masaaki Fujiyama | 1983-11-08 |
| 4414271 | Magnetic recording medium and method of preparation thereof | Tatsuji Kitamoto, Ryuji Shirahata, Yasuyuki Yamada | 1983-11-08 |
| 4409281 | Magnetic recording medium | Tatsuji Kitamoto | 1983-10-11 |
| 4407853 | Process for producing a magnetic recording medium | Tsutomu Okita, Kyoichi Naruo | 1983-10-04 |
| 4403002 | Vacuum evaporating apparatus | Ryuji Shirahata | 1983-09-06 |
| 4397911 | Cleaning tape | Masaaki Fujiyama | 1983-08-09 |
| 4391851 | Process for producing a magnetic recording medium | Yasuyuki Yamada, Nobuo Tsuji, Yoshito Mukaida, Masaaki Fujiyama | 1983-07-05 |
| 4388368 | Magnetic recording media | Noburo Hibino | 1983-06-14 |
| 4388360 | Magnetic recording medium | Takahito Miyoshi, Toshimitu Okutu, Masaaki Takimoto, Takashi Saida, Masaaki Fujiyama | 1983-06-14 |
| 4368237 | Process for producing magnetic recording device | Yasuyuki Yamada, Tatsuji Kitamoto | 1983-01-11 |
| 4343831 | Process for producing magnetic recording medium | Nobuo Tsuji, Masaaki Fujiyama, Yasuyuki Yamada | 1982-08-10 |
| 4310599 | Magnetic recording element | Masaaki Fujiyama | 1982-01-12 |
| 4273797 | Method of detecting pinholes in a magnetic recording medium | Yasuyuki Yamada, Masaaki Fujiyama, Nobutaka Yamaguchi | 1981-06-16 |
| 4267207 | Process for producing cobalt-containing ferromagnetic iron oxide powder | Koji Sasazawa, Tatsuji Kitamoto, Kouichi Masaki, Shinichiro Dezawa | 1981-05-12 |
| 4260466 | Method of producing magnetic recording medium | Ryuji Shirahata, Tatsuji Kitamoto, Yasuyuki Yamada | 1981-04-07 |
| 4242783 | Calender roll for use in super calender for magnetic tapes | Kenji Watanabe | 1981-01-06 |
| 4200680 | Process for preparing magnetic iron oxide and magnetic iron oxide produced thereby | Koji Sasazawa, Shigeo Komine, Tatsuji Kitamoto | 1980-04-29 |
| 4187341 | Magnetic recording tape | Masaaki Suzuki, Osamu Suzuki | 1980-02-05 |