Issued Patents All Time
Showing 51–75 of 101 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5768218 | Magneto-optical recording medium having a plurality of magnetic layers | Junichiro Nakayama, Junji Hirokane, Akira Takahashi | 1998-06-16 |
| 5764601 | Method of manufacturing a magneto-optical recording medium having a readout layer with varying composition and curie temperature | Naoyasu Iketani, Akira Takahashi, Kenji Ohta | 1998-06-09 |
| 5757734 | Magneto-optical recording medium and method for reproducing from same | Junsaku Nakajima, Junji Hirokane, Akira Takahashi | 1998-05-26 |
| 5707727 | Magneto-optical recording medium | Akira Takahashi, Junsaku Nakajima, Kenji Ohta, Junichiro Nakayama, Hiroyuki Katayama +1 more | 1998-01-13 |
| 5705286 | Magneto-optical recording medium | Junji Hirokane, Hiroyuki Katayama, Akira Takahashi, Kenji Ohta | 1998-01-06 |
| RE35629 | Magneto-optical memory element | Akira Takahashi, Kazuo Van, Junichiro Nakayama, Hiroyuki Katayama, Kenji Ohta | 1997-10-14 |
| 5676854 | Optical memory having narrowed track pitch | Tetsuya Inui, Akira Takahashi, Kenji Ohta, Michinobu Mieda | 1997-10-14 |
| 5662988 | Magneto-optical recording medium | Junichiro Nakayama, Hiroyuki Katayama, Akira Takahashi, Kenji Ohta | 1997-09-02 |
| 5656385 | Magnetic recording medium and information recording-reproduction method using the same | Junsaku Nakajima, Akira Takahashi, Junji Hirokane, Kenji Ohta | 1997-08-12 |
| 5657299 | Magneto-optical recording medium | Junsaku Nakajima, Akira Takahashi | 1997-08-12 |
| 5637394 | Magneto-optical recording medium and method of reproducing magneto-optical information using thereof | Junsaku Nakajima, Naoyasu Iketani, Akira Takahashi, Hiroyuki Katayama, Kenji Ohta | 1997-06-10 |
| 5631096 | Magneto optical memory device | Junsaku Nakajima, Kenji Ohta, Akira Takahashi | 1997-05-20 |
| 5615182 | Magneto-optical disk and the reproducing method thereof | Junsaku Nakajima, Akira Takahashi, Junichiro Nakayama, Kenji Ohta | 1997-03-25 |
| 5586109 | Optical memory having narrowed track pitch | Tetsuya Inui, Akira Takahashi, Kenji Ohta, Michinobu Mieda | 1996-12-17 |
| 5563852 | Magneto-optical recording medium having a readout layer with varying composition and curie temperature | Naoyasu Iketani, Akira Takahashi, Kenji Ohta | 1996-10-08 |
| 5499229 | Track scanning for reproducing address information by crosstalk | Akira Takahashi, Kenji Ohta | 1996-03-12 |
| 5490131 | Optical disk | Kenji Ohta, Toshikazu Nagaura, Masayasu Futagawa, Shinji Yamagami, Hiroyuki Ikenaga +3 more | 1996-02-06 |
| 5486395 | Magneto-optical disk | Naoyasu Iketani, Akira Takahashi, Kenji Ohta | 1996-01-23 |
| 5477528 | Magneto-optical disk and the reproducing method thereof | Junsaku Nakajima, Akira Takahashi, Junichiro Nakayama, Kenji Ohta | 1995-12-19 |
| 5475658 | Magneto-optical recording device for improving C/N ratio | Akira Takahashi, Kenji Ohta | 1995-12-12 |
| 5452272 | Magneto-optical recording and reproducing device having light interrupting forming main robe and side robe light beam portions | Junsaku Nakajima, Akira Takahashi, Kenji Ohta | 1995-09-19 |
| 5427833 | Magneto-optical recording medium and method for processing the surface | Junichiro Nakayama, Hiroyuki Katayama, Kenji Ohta | 1995-06-27 |
| 5353278 | Magneto-optical disk and method of manufacturing the same | Junichiro Nakayama, Hiroyuki Katayama, Akira Takahashi, Kenji Ohta, Hirotaka Toki | 1994-10-04 |
| 5331612 | Magneto-optical recording apparatus using the magnetic field modulation method | Kenji Ohta, Akira Takahashi | 1994-07-19 |
| 5328740 | Magneto-optical recording medium and method for processing the surface | Junichiro Nakayama, Hiroyuki Katayama, Kenji Ohta | 1994-07-12 |