Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5985403 | Magnetic recording medium and magnetic recording reproducer | Takayuki Nakakawaji, Tomoe Takamura, Shuji Imazeki, Yutaka Ito, Hisashi Morooka +2 more | 1999-11-16 |
| 5830834 | Ammonium carboxylate type fluorine-containing compound, solid surface modifier containing the same and magnetic recording medium using the same | Takayuki Nakakawaji, Hiroshi Sasaki, Yutaka Ito, Shigeki Komatsuzaki, Hiroyuki Matsumoto | 1998-11-03 |
| 5549835 | Apparatus equipped with a cooling block unit having sliding parts and a compound used to the same | Takao Uematsu, Takayuki Nakakawaji, Shigeki Komatsuzaki, Yutaka Ito, Atsushi Morihara +3 more | 1996-08-27 |
| 5536578 | Magnetic recording medium comprising a protective layer and a layer of ammonium carboxylate fluorine-containing compound | Takayuki Nakakawaji, Hiroshi Sasaki, Yutaka Ito, Shigeki Komatsuzaki, Hiroyuki Matsumoto | 1996-07-16 |
| 5456980 | Ammonium carboxylate lubricant and magnetic recording medium using the same | Yuko Murakami, Takayuki Nakakawaji, Juichi Arai, Yutaka Ito | 1995-10-10 |
| 5346633 | Method for surface treatment of a body, surface treatment agent, surface treated body, surface treated members, and apparatus being furnished with same | Takayuki Nakakawaji, Atsushi Morihara, Koji Sato, Yutaka Ito, Ryuichi Kaji +1 more | 1994-09-13 |
| 5252418 | Electrophotographic photoreceptor with protruding inorganic insulator pieces and an electrophotographic apparatus utilizing the same | Fuminori Ishikawa, Akira Sato, Kunihiro Tamahashi, Masatoshi Wakagi, Katsumi Tamura +6 more | 1993-10-12 |
| 5223342 | Magnetic recording medium having a lubricating layer comprising a binder and specified perfluoro polyoxyalkyl lubricant | Yutaka Ito, Fumio Nakano, Toshikazu Narahara | 1993-06-29 |
| 5204202 | Electrophotographic photosensitive element comprising a protective layer with a porous surface impregnated with lubricant | Fuminori Ishikawa, Kunihiro Tamahashi, Shigeharu Onuma, Masatoshi Wakagi, Masanobu Hanazono +4 more | 1993-04-20 |
| 5157066 | Fluoroalkyl ether, surface modifying composition and method for modifying surface | Takayuki Nakakawaji, Yutaka Ito, Shigeki Komatsuzaki, Akio Mukoh | 1992-10-20 |
| 5128435 | Magnetic recording medium based on epoxy resins modified by isocyanates with poly(perfluoroether) backbones | Takayuki Nakakawaji, Yutaka Ito, Shigeki Komatsuzaki, Toshikazu Narahara | 1992-07-07 |
| 5073466 | Electrophotographic member containing a fluorine-containing lubricating agent and process for producing the same | Fuminori Ishikawa, Kunihiro Tamahashi, Shigeharu Onuma, Masatoshi Wakagi, Masanobu Hanazono +5 more | 1991-12-17 |
| 5071715 | Magnetic recording medium with a lubricant layer containing a perfluoro polyoxyalkyl compound | Yutaka Ito, Fumio Nakano, Toshikazu Narahara | 1991-12-10 |
| 4454052 | Liquid absorbent for absorption type refrigerator | Etsuo Oe, Yoshiharu Honma, Shigeki Komatsuzaki, Moriichi Sato, Ren Ito | 1984-06-12 |