Issued Patents 1997
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5691963 | Magneto-optical recording device using light-modulated technic without an initial magnetic field | Hiroyuki Katayama, Akira Takahashi, Kenji Ohta | 1997-11-25 |
| 5684764 | Magneto-optical recording medium having a plurality of magnetic layers | Michinobu Mieda, Junichiro Nakayama, Akira Takahashi | 1997-11-04 |
| 5683803 | Magneto-optical recording medium and method of recording and reproducing using the same | Junichiro Nakayama, Michinobu Mieda, Akira Takahashi, Kenji Ohta | 1997-11-04 |
| 5680376 | Optical recording medium, and apparatus and method for recording and reproducing information on the same | Hiroyuki Katayama, Akira Takahashi, Kenji Ohta | 1997-10-21 |
| 5673250 | Optical recording medium having pit rows on every other boundary and reproducing method thereof | Michinobu Mieda, Akira Takahashi, Kenji Ohta, Shigeo Terashima | 1997-09-30 |
| 5666332 | Magneto-optical recording medium permitting an initializing magnetic field smaller than a recording magnetic field, and method of recording there on | Junichiro Nakayama, Michinobu Mieda, Akira Takahashi | 1997-09-09 |
| 5659537 | Magneto-optical recording medium and method of reproducing from same | Junichiro Nakayama, Michinobu Mieda, Akira Takahashi | 1997-08-19 |
| 5656385 | Magnetic recording medium and information recording-reproduction method using the same | Junsaku Nakajima, Akira Takahashi, Yoshiteru Murakami, Kenji Ohta | 1997-08-12 |
| 5648162 | Magneto-optical recording medium and a method of recording and/or reproducing using the same | Hiroyuki Katayama, Akira Takahashi, Kenji Ohta | 1997-07-15 |
| 5644566 | Magneto-optical recording medium | Junichiro Nakayama, Michinobu Mieda, Hiroyuki Katayama, Akira Takahashi, Kenji Ohta | 1997-07-01 |
| 5640374 | Magneto-optical recording medium having intermediate layer of in-plane magnetization and method of reproducing from the medium | Michinobu Mieda, Junichiro Nakayama, Akira Takahashi | 1997-06-17 |
| 5638111 | Optical probe element, and a recording and reproduction device using the optical probe element | Hiroyuki Katayama, Akira Takahashi | 1997-06-10 |
| 5635977 | Optical probe element and a recording and reproduction device using the optical probe element | Hiroyuki Katayama, Akira Takahashi | 1997-06-03 |
| 5633838 | Magneto-optical recording medium having two reproduction layers and a method for reproducing thereof | Junichiro Nakayama, Michinobu Mieda, Akira Takahashi | 1997-05-27 |
| 5629908 | Magneto-optical recording medium having magnetization variable between in-plane magnetization and perpendicular magnetization | Junichiro Nakayama, Michinobu Mieda, Akira Takahashi | 1997-05-13 |
| 5600627 | Optical disk and a method for recording, reproducing, and deleting information on and from the optical disk | Hiroyuki Katayama, Akira Takahashi, Kenji Ohta | 1997-02-04 |