Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6519387 | Image recording device and optical fiber | Hiroshi Sunagawa | 2003-02-11 |
| 5981042 | Medium for recording information on ferroelectric material using polarization | Ryoichi Yamamoto, Kazuo Sanada | 1999-11-09 |
| 5684522 | Method of recording information on ferroelectric material using polarization | Ryoichi Yamamoto, Kazuo Sanada | 1997-11-04 |
| 5418029 | Information recording medium and method | Ryoichi Yamamoto, Kazuo Sanada | 1995-05-23 |
| 5371729 | Information recording method | Ryoichi Yamamoto, Kazuo Sanada | 1994-12-06 |
| 5055353 | Magneto-optical recording medium | Ryoichi Yamamoto, Kiichi Kato, Takashi Yamada | 1991-10-08 |
| 4983025 | Magneto-optical thin film | — | 1991-01-08 |
| 4822673 | Microwave device | — | 1989-04-18 |
| 4805145 | Method for recording and reproducing information | — | 1989-02-14 |
| 4713258 | Method of forming ultrafine patterns | — | 1987-12-15 |
| 4608093 | Ferromagnetic particles with stable magnetic characteristics and method of preparing same | Tatsuji Kitamoto | 1986-08-26 |
| 4554089 | Ferromagnetic particles with stable magnetic characteristics and method of preparing same | Tatsuji Kitamoto | 1985-11-19 |
| 4487627 | Method for preparing ferromagnetic metal particles | Tatsuji Kitamoto | 1984-12-11 |
| 4481253 | Process for preparing ferromagnetic metal powder and a magnetic recording medium including the powder | Akihiro Matsufuji, Akira Kasuga, Hajime Miyatuka, Goro Akashi | 1984-11-06 |
| 4475946 | Ferromagnetic metal particles of iron alloyed with Ti, V, Cr, Mn, Co, Ni, Cu, Zn, Si, P, Mo, Sn, Sb and Ag coated with mono- or dialkoxysilanes | Akihiro Matsufuji, Masashi Aonuma, Hajime Miyatsuka, Tatsuji Kitamoto | 1984-10-09 |
| 4437882 | Ferromagnetic powder treated with an organic silane compound | Akihiro Matsufuji, Masashi Aonuma, Tatsuji Kitamoto, Hajime Miyatsuka | 1984-03-20 |