Issued Patents All Time
Showing 76–92 of 92 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5193082 | Optical/magnetic composite head having magnetic and optical heads in one integrated unit | Tomoyuki Miyake, Hiroyuki Katayama, Akira Takahashi, Kenji Ohta | 1993-03-09 |
| 5187703 | Magneto-optical multilayer recording disk and method of reproducing the same | Hiroyuki Katayama, Kenji Ohta, Toshio Ishikawa | 1993-02-16 |
| 5175721 | Magneto-optical recording and reading device with initilization | Tomoyuki Miyake, Hiroyuki Katayama, Kenji Ohta | 1992-12-29 |
| 5160572 | Optical memory device and apparatus for manufacturing the same | Kazuhiro Kimura, Hiroyuki Katayama, Kenji Ohta | 1992-11-03 |
| 5157568 | Floating type magnetic head device | Hiroyuki Katayama, Tomoyuki Miyake, Kenji Ohta | 1992-10-20 |
| 5117415 | Optical card, a card holder and an apparatus for recording, reproducing and erasing information on and from the optical card | Kenji Ohta, Hiroyuki Katayama, Kazuhiro Kimura, Hirotsugu Matoba, Shozo Kobayashi | 1992-05-26 |
| 5107471 | Magnetic head having a rectangular configuration for use in a magneto-optical recording system | Tomoyuki Miyake, Kenji Ohta, Hiroyuki Katayama | 1992-04-21 |
| 5095350 | Magneto-optic memory medium | Kenji Ohta, Akira Takahashi, Hiroyuki Katayama, Tomokazu Ise, Tomoyuki Miyake | 1992-03-10 |
| 5082690 | Process for manufacturing a magneto-optic disc | Tomoyuki Miyake, Hiroyuki Katayama, Yoshiteru Murakami, Kenji Ohta | 1992-01-21 |
| 5077725 | Optical memory device and apparatus for manufacturing the same | Kazuhiro Kimura, Hiroyuki Katayama, Kenji Ohta | 1991-12-31 |
| 5077714 | Magneto-optical recording and reproducing device using the modulation of intensities of the magnetic field and light beam | Hiroyuki Katayama, Kenji Ohta, Tomoyuki Miyake, Akira Takahashi | 1991-12-31 |
| 5068841 | Magneto-optical recording/reproducing device | Hiroyuki Katayama, Kenji Ohta | 1991-11-26 |
| 5059473 | Optical recording medium and manufacturing method thereof | Akira Takahashi, Michinobu Mieda, Yoshiteru Murakami, Tomoyuki Miyake, Kenji Ohta | 1991-10-22 |
| 5058099 | Magneto-optical memory element | Yoshiteru Murakami, Akira Takahashi, Kazuo Van, Hiroyuki Katayama, Kouji Ohta | 1991-10-15 |
| 5053611 | Device for reducing mechanical vibrations when utilizing a magneto-optical card as a recording medium | Akira Takahashi, Yoshiteru Murakami, Kenji Ohta, Hiroyuki Katayama, Michinobu Mieda | 1991-10-01 |
| 5053252 | Method and apparatus for manufacturing optical memory devices | Kazuhiro Kimura, Hiroyuki Katayama, Kenji Ohta, Hiroyuki Ikenaga | 1991-10-01 |
| 5002813 | Substrate with protective film and method of manufacturing optical memory device using the same | Kenji Ohta, Hiroyuki Katayama, Akira Takahashi, Yoshiteru Murakami | 1991-03-26 |