Issued Patents All Time
Showing 51–75 of 92 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5530685 | Magneto-optical recording apparatus having paired devices for applying external magnetic fields | Hiroyuki Katayama, Michinobu Mieda, Junji Hirokane, Akira Takahashi, Kenji Ohta | 1996-06-25 |
| 5498485 | Magneto-optical recording medium and manufacturing method thereof | Hiroyuki Katayama, Junji Hirokane, Michinobu Mieda | 1996-03-12 |
| 5477528 | Magneto-optical disk and the reproducing method thereof | Yoshiteru Murakami, Junsaku Nakajima, Akira Takahashi, Kenji Ohta | 1995-12-19 |
| 5453884 | Magneto-optical recording medium | Kenji Ohta, Hiroyuki Katayama | 1995-09-26 |
| 5427833 | Magneto-optical recording medium and method for processing the surface | Yoshiteru Murakami, Hiroyuki Katayama, Kenji Ohta | 1995-06-27 |
| 5428585 | Magneto-optical recording medium comprising first, second and third magnetic layers and method of recording on same | Junji Hirokane, Hiroyuki Katayama, Akira Takahashi, Kenji Ohta | 1995-06-27 |
| 5425008 | Magneto-optical memory device whereon overwriting operation can be carried out through light intensity modulation and method for recording and erasing using it | Kenji Ohta, Hiroyuki Katayama | 1995-06-13 |
| 5422865 | Light modulation method for magneto-optical recording device | Hiroyuki Katayama, Junji Hirokane, Akira Takahashi, Kenji Ohta | 1995-06-06 |
| 5402408 | Magneto-optical recording method of overwriting without requiring an initialization magnet | Junji Hirokane, Hiroyuki Katayama, Michinobu Mieda, Kenji Ohta | 1995-03-28 |
| 5386400 | Magneto-optical head device having a lubricated member | Tomoyuki Miyake, Hiroyuki Katayama, Kenji Ohta | 1995-01-31 |
| 5353278 | Magneto-optical disk and method of manufacturing the same | Yoshiteru Murakami, Hiroyuki Katayama, Akira Takahashi, Kenji Ohta, Hirotaka Toki | 1994-10-04 |
| 5347510 | Method of manufacturing a master plate where its guide groove has an inclined angle | Junji Hirokane, Hiroyuki Katayama, Michinobu Mieda, Kenji Ohta | 1994-09-13 |
| 5343448 | External magnetic field device for a magnetooptical information recording and reproducing apparatus | Tomoyuki Miyake, Hiroyuki Katayama, Takahiro Miyake, Kenji Ohta, Shozo Kobayashi | 1994-08-30 |
| 5338646 | Optical memory device having an improved light reflection or optical memory layer | Tomoyuki Miyake, Hiroyuki Katayama, Kazuo Van, Kenji Ohta | 1994-08-16 |
| 5336531 | Magneto-optical disk and manufacturing methods thereof | Hiroyuki Katayama, Kenji Ohta | 1994-08-09 |
| 5328740 | Magneto-optical recording medium and method for processing the surface | Yoshiteru Murakami, Hiroyuki Katayama, Kenji Ohta | 1994-07-12 |
| 5313357 | Magnetic storage device and manufacturing method thereof | Kenji Ohta, Tetsurou Muramatsu | 1994-05-17 |
| 5313445 | Reproducing apparatus with suspension supporting a floating-type head with a bevelled slider | Katsuo Wada, Miyuki Onishi, Tomoyuki Miyake, Takashi Iwaki, Takeshi Yamaguchi | 1994-05-17 |
| 5305254 | Magneto-optic memory device | Yoshiteru Murakami, Ichiro Hiramatsu, Akira Takahashi, Kenji Ohta, Kazuo Van +1 more | 1994-04-19 |
| 5303100 | Magnetic disk device with floating-type magnetic head | Hiroyuki Katayama, Tomoyuki Miyake, Kenji Ohta | 1994-04-12 |
| 5278810 | Magneto-optical recording medium whereon recording is carried out with an overwriting function | Akira Takahashi, Hiroyuki Katayama, Kenji Ohta | 1994-01-11 |
| 5270994 | Magneto-optical recording and reading method | Tomoyuki Miyake, Hiroyuki Katayama, Kenji Ohta | 1993-12-14 |
| 5233597 | Magneto-optical disk having a layer of varying thickness | Hiroyuki Katayama, Kenji Ohta | 1993-08-03 |
| 5231613 | Magneto-optical recording device | Tomoyuki Miyake, Hiroyuki Katayama, Kenji Ohta | 1993-07-27 |
| 5214636 | Optical recording element having a plurality of thin film filtering layers and optical recording element having an electrically conductive layer | Toshio Ishikawa, Hiroyuki Katayama, Kazuo Van, Tomoyuki Miyake, Kenji Ohta +1 more | 1993-05-25 |