Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6627253 | Magnetic recording media for longitudinal recording, process for producing the same and magnetic memory apparatus | Hiroyuki Suzuki, Yoshihiro Shiroishi, Sadao Hishiyama, Tomoyuki Ohno, Yotsuo Yahisa +5 more | 2003-09-30 |
| 6335103 | Magnetic recording media for longitudinal recording | Hiroyuki Suzuki, Yoshihiro Shiroishi, Sadao Hishiyama, Tomoyuki Ohno, Yotsuo Yahisa +5 more | 2002-01-01 |
| 5665478 | Magnetic recording media for longitudinal recording | Hiroyuki Suzuki, Yoshihiro Shiroishi, Sadao Hishiyama, Tomoyuki Ohno, Yotsuo Yahisa +5 more | 1997-09-09 |
| 5285343 | Magnetic disk with surface protective layer having convex portions and magnetic disk apparatus including such a magnetic disk | Hideaki Tanaka, Kenichi Gomi, Shoichi Sawahata, Maki Kondo, Masaki Ohura +6 more | 1994-02-08 |
| 5147732 | Longitudinal magnetic recording media and magnetic memory units | Yoshihiro Shiroishi, Takeo Yamashita, Sadao Hishiyama, Noriyuki Kumasaka, Yoshibumi Matsuda +4 more | 1992-09-15 |
| 5143794 | Magnetic recording media for longitudinal recording, process for producing the same and magnetic memory apparatus | Hiroyuki Suzuki, Yoshihiro Shiroishi, Sadao Hishiyama, Tomoyuki Ohno, Yotsuo Yahisa +5 more | 1992-09-01 |
| 4950548 | Magnetic recording medium and method of producing same | Kenji Furusawa, Katsuo Abe, Hiroyuki Kataoka, Tokuho Takagaki, Yoshihiro Shiroishi | 1990-08-21 |
| 4939045 | Magnetic recording medium | Kazuetsu Yoshida, Yoshihiro Shiroishi, Makoto Saito, Takeo Yamashita, Hiroyuki Suzuki +8 more | 1990-07-03 |
| 4883711 | Magnetic recording medium | Yoshihiro Shiroishi, Sadao Hishiyama, Hiroyuki Suzuki, Tomoyuki Ohno, Yoshibumi Matsuda +4 more | 1989-11-28 |
| 4833020 | Magnetic recording medium | Yoshihiro Shiroishi, Sadao Hishiyama, Hiroyuki Suzuki, Tomoyuki Ohno, Yoshibumi Matsuda +4 more | 1989-05-23 |
| 4786553 | Magnetic recording medium | Yoshihiro Shiroishi, Sadao Hishiyama, Hiroyuki Suzuki, Tsuneo Suganuma, Yoshio Gobara +3 more | 1988-11-22 |
| 4743491 | Perpendicular magnetic recording medium and fabrication method therefor | Seiichi Asada, Hiroyuki Suzuki, Toshio Niihara, Kazuetsu Yoshida, Masaaki Futamoto +2 more | 1988-05-10 |
| 4415262 | Photomask | Naoki Koyama, Youji Maruyama, Hiroshi Umezaki, Yutaka Sugita | 1983-11-15 |
| 4404233 | Ion implanting method | Tadashi Ikeda, Yutaka Sugita | 1983-09-13 |
| 4344153 | Magnetic bubble memory device and method of fabricating the same | Hideki Nishida, Hirozi Yamada, Hiroshi Umezaki, Yutaka Sugita | 1982-08-10 |
| 4288283 | Method of forming a microscopic pattern | Hiroshi Umezaki, Hideki Nishida, Hirozi Yamada, Katsuhiro Kaneko, Nagatugu Koiso | 1981-09-08 |