Issued Patents All Time
Showing 1–25 of 48 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6443827 | Polishing member and process for producing the same | Tadashi Ishiguro | 2002-09-03 |
| 6012969 | Abrasive member for very high return loss optical connector ferrules | Masaaki Fujiyama, Tadashi Ishiguro | 2000-01-11 |
| 5711772 | Abrasive member | Masaaki Fujiyama | 1998-01-27 |
| 5702800 | Abrasive tape for magnetic information reading apparatus for photographic use, abrasive tape package, and a method for cleaning the apparatus | Keiji Mihayashi | 1997-12-30 |
| 5695386 | Cleaning method using abrasive tape | Keisuke Yamada, Masaaki Fujiyama | 1997-12-09 |
| 5672185 | Abrasive member | — | 1997-09-30 |
| 5639284 | Abrasive member | Tadashi Ishiguro, Masaaki Fujiyama | 1997-06-17 |
| 5633068 | Abrasive tape having an interlayer for magnetic head cleaning and polishing | Masaaki Fujiyama, Keisuke Yamada | 1997-05-27 |
| 5632789 | Abrasive tape | Kazuko Hanai, Masaaki Fujiyama | 1997-05-27 |
| 5611826 | Abrasive tape | Masami Sato, Masaaki Fujiyama | 1997-03-18 |
| 5573444 | Polishing method | Keisuke Yamada, Masaaki Fujiyama | 1996-11-12 |
| 5512350 | Magnetic recording medium having a magnetic layer with a specified surface roughness and which contains ferromagnetic powder, binder, and an abrasive | Katsuhiko Meguro, Hiroaki Doushita, Masaki Suzuki, Toshiyuki Kitahara, Masami Sato | 1996-04-30 |
| 5456734 | Abrasive member | Masami Sato, Masaaki Fujiyama | 1995-10-10 |
| 5407725 | Magnetic recording medium having a magnetic layer containing two carbon blacks each within specific particle size and DBP adsorption ranges | Yutaka Kakuishi, Toshiyuki Kitahara, Tetsuji Nishida | 1995-04-18 |
| 5326618 | Magnetic recording medium and process for production thereof | Yutaka Kakuishi, Toshiyuki Kitahara, Akihiro Matsufuji | 1994-07-05 |
| 5238753 | Magnetic recording medium kubbed with a super hard alloy blade containing tungsten carbide power and cobalt | Youichi Hayata, Junji Yazawa, Toshihiko Miura, Masaki Suzuki, Tatsuya Oguri | 1993-08-24 |
| 5212019 | Magnetic recording medium having a magnetic layer containing ferromagnetic metal powder, binder, fatty acid ester, and a specified branched chain fatty acid | Yutaka Kakuishi, Masaki Suzuki | 1993-05-18 |
| 5196265 | Magnetic recording medium | Yutaka Kakuishi, Toshiyuki Kitahara | 1993-03-23 |
| 5094908 | Magnetic recording medium | Masatoshi Takahashi, Toshihiko Miura | 1992-03-10 |
| 5089331 | Magnetic recording medium | Masatoshi Takahashi, Tsugio Izaki, Masaki Suzuki | 1992-02-18 |
| 5063105 | Magnetic recording medium in which certain physical properties of the magnetic layer and the backcoat layer are specified | Masatoshi Takahashi, Yasuo Nishikawa | 1991-11-05 |
| 5008147 | Magnetic recording medium | Masatoshi Takahashi, Akihiro Hashimoto, Kazuo Hasumi | 1991-04-16 |
| 4988562 | Magnetic recording media | Masatoshi Takahashi, Akihiro Hashimoto | 1991-01-29 |
| 4886703 | Magnetic recording medium | Kazuo Hasumi, Hideomi Watanabe, Tsutomu Okita, Hideaki Kosha | 1989-12-12 |
| 4880692 | Magnetic recording medium | Masatoshi Takahashi, Akihiro Hashimoto, Tsutomu Okita, Kazuko Hanai | 1989-11-14 |