Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5587235 | Magnetic recording medium and magnetic recording apparatus | Hiroyuki Suzuki, Naoki Kodama, Takao Yonekawa, Tokuho Takagaki, Naoto Endo +1 more | 1996-12-24 |
| 5270987 | Magneto-optical recording and reproducing method, magneto-optical memory apparatus and magneto-optical recording medium therefor | Toshimitsu Kaku, Shigeru Nakamura, Masahiko Takahashi, Toshio Niihara, Harukazu Miyamoto +7 more | 1993-12-14 |
| 5034243 | Method for magnetic orientation of magnetic recording medium using Meissner effect of high Tc superconductor | Katsuyoshi Chiba, Masayuki Katsumoto, Yasutaro Uesaka, Heigo Ishihara, Naoki Kodama +2 more | 1991-07-23 |
| 4828592 | Polarization plane maintaining optical fiber fabricating method | Hiroyoshi Matsumura, Toshio Katsuyama | 1989-05-09 |
| 4786553 | Magnetic recording medium | Yoshihiro Shiroishi, Sadao Hishiyama, Hiroyuki Suzuki, Norikazu Tsumita, Yoshio Gobara +3 more | 1988-11-22 |
| 4604577 | Temperature-compensated magnetic field measuring instrument | Hiroyoshi Matsumura, Toshio Katsuyama, Norio Ohta, Kazuyuki Nagatsuma, Yutaka Sugita | 1986-08-05 |
| 4581579 | Optical magnetic-field measuring apparatus having improved temperature characteristics | Kazuyuki Nagatsuma, Hiroyoshi Matsumura, Norio Ohta, Keikichi Ando, Yuzuru Hosoe +1 more | 1986-04-08 |
| 4570064 | Optical D.C. electric-field measuring apparatus with optic sensing means exhibiting both electrooptic and photoelectric effects | Kazuyuki Nagatsuma, Hiroyoshi Matsumura, Toshio Katsuyama | 1986-02-11 |
| 4505729 | Method of producing optical fiber preform | Hiroyoshi Matsumura, Toshio Katsuyama | 1985-03-19 |
| 4483617 | Optical gyroscope with large propagation constant difference | Hiroyoshi Matsumura, Toshio Katsuyama | 1984-11-20 |
| 4426216 | Process for producing optical glass | Shin Satoh, Kenzo Susa, Iwao Matsuyama | 1984-01-17 |
| 4426129 | Optical fiber and method of producing the same | Hiroyoshi Matsumura, Toshio Katsuyama | 1984-01-17 |
| 4406518 | Single-mode-transmission optical fiber and a method of manufacturing the same | Hiroyoshi Matsumura, Toshio Katsuyama | 1983-09-27 |
| 4390460 | Lithium oxide based amorphous material and process for preparation thereof | Katsuki Miyauchi, Tetsu Oi | 1983-06-28 |
| 4324576 | Method for producing optical glass | Iwao Matsuyama, Kenzo Susa, Shin Satoh | 1982-04-13 |
| 4323381 | Method for producing mother rods for optical fibers | Iwao Matsuyama, Kenzo Susa, Shin Satoh, Toshio Katsuyama, Hidehito Obayashi | 1982-04-06 |
| 4317668 | Method for producing silica glass | Kenzo Susa, Iwao Matsuyama, Shin Satoh | 1982-03-02 |
| 4259101 | Method for producing optical fiber preform | Yasuo Tsukuda, Katsuyuki Imoto, Kenzo Susa, Iwao Matsuyama | 1981-03-31 |
| 4206968 | Optical fiber and method for producing the same | Gyozo Toda, Koji Ishida, Shin Satoh, Toshio Katsuyama, Mamoru Sugie | 1980-06-10 |
| 4206967 | Optical fiber | Seiichi Onoda, Shojiro Kawakami, Shigeo Nishida, Toshiki Tanaka, Masao Sumi | 1980-06-10 |
| 4203743 | Method of producing optical fiber | Koji Ishida, Shin Satoh, Mamoru Sugie, Toshio Katsuyama, Gyozo Toda | 1980-05-20 |
| 4185890 | Optical transmission line | Seiichi Onoda, Toshiki Tanaka, Koji Ishida, Masao Sumi | 1980-01-29 |