Issued Patents All Time
Showing 26–50 of 101 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6483785 | Magneto-optical recording method using the relation of beam diameter and an aperture of converging lens | Junji Hirokane, Junichiro Nakayama, Junsaku Nakajima, Akira Takahashi, Kenji Ohta +1 more | 2002-11-19 |
| 6463015 | Method of reproducing information on a magneto-optical recording medium for achieving super resolution reproduction of high resolution recorded information | Junji Hirokane, Akira Takahashi | 2002-10-08 |
| 6456586 | Magneto-optical recording medium and process for producing the same | Ippei Suzuki, Naoyasu Iketani, Akira Takahashi | 2002-09-24 |
| 6298018 | Optical recording and reproducing method optical recording and reproducing device, and optical recording medium | Akira Takahashi, Naoyasu Iketani, Ippei Suzuki, Go Mori, Shinya Hirata | 2001-10-02 |
| 6295271 | Optical recording medium having tracks, each track having a plurality of wobble sections/one-side wobble regions | Tetsuya Inui, Hideaki Sato, Junichiro Nakayama, Naoyasu Iketani, Michinobu Mieda +2 more | 2001-09-25 |
| 6272077 | Magneto-optical recording medium having intermediate layer of in plane magnetization | Akira Takahashi, Michinobu Mieda, Naoyasu Iketani, Go Mori, Junsaku Nakajima +1 more | 2001-08-07 |
| 6261707 | Magneto-optical recording medium and recording and reproducing method and optical head designed for the magneto-optical recording medium | Junji Hirokane, Junichiro Nakayama, Junsaku Nakajima, Akira Takahashi, Kenji Ohta +1 more | 2001-07-17 |
| 6178143 | Magneto-optical recording medium for achieving super resolution reproduction of high resolution recorded information | Junji Hirokane, Akira Takahashi | 2001-01-23 |
| 6147939 | Magneto-optical recording medium having intermediate layer of in-plane magnetization | Akira Takahashi, Michinobu Mieda, Naoyasu Iketani, Go Mori, Junsaku Nakajima +1 more | 2000-11-14 |
| 6143436 | Magnetic recording medium and information recording-reproduction method using the same | Junsaku Nakajima, Akira Takahashi, Junji Hirokane, Kenji Ohta | 2000-11-07 |
| 6128274 | Optical recording disk capable of suppressing bimetallic effects caused by thermal expansion | Go Mori, Michinobu Mieda, Naoyasu Iketani, Ippei Suzuki, Akira Takahashi | 2000-10-03 |
| 6122233 | Optical disk having virtually constant width recording track and optical disk apparatus | Naoyasu Iketani, Go Mori, Michinobu Mieda, Junji Hirokane, Akira Takahashi | 2000-09-19 |
| 6067285 | Optical disc | Kenji Ohta, Toshikazu Nagaura, Masayasu Futagawa, Shinji Yamagami, Hiroyuki Ikenaga +3 more | 2000-05-23 |
| 6031816 | Optical recording medium, method for manufacturing the same, and optical information recording and reproducing device used with respect to the same | Tetsuya Inui, Hideaki Sato, Junichiro Nakayama, Naoyasu Iketani, Michinobu Mieda +2 more | 2000-02-29 |
| 6001467 | Magneto-optic memory medium | Kenji Ohta, Akira Takahashi, Junichiro Nakayama, Tomoyuki Miyake | 1999-12-14 |
| 5991259 | Optical disk with tracking guide of wind and unwind portions | Junichiro Nakayama, Naoyasu Iketani, Michinobu Mieda, Akira Takahashi | 1999-11-23 |
| 5989705 | Magneto-optical recording medium | Junsaku Nakajima, Akira Takahashi, Junji Hirokane | 1999-11-23 |
| 5985436 | Magneto-optical recording medium, magneto-optical recording method, and magneto-optical recording apparatus | Junji Hirokane, Akira Takahashi | 1999-11-16 |
| 5955191 | Magneto-optical recording medium and a reproducing method using such a medium | Junji Hirokane, Akira Takahashi | 1999-09-21 |
| 5933411 | Optical recording medium having a wobbling section for recording address information and methods of recording and reproduction using same | Tetsuya Inui, Hideaki Sato, Junichiro Nakayama, Naoyasu Iketani, Michinobu Mieda +2 more | 1999-08-03 |
| 5926444 | Magneto-optical recording medium for achieving super resolution reproduction of high resolution recorded information | Junji Hirokane, Akira Takahashi | 1999-07-20 |
| 5922177 | Magneto-optical recording medium and producing method thereof | Naoyasu Iketani, Akira Takahashi, Kenji Ohta | 1999-07-13 |
| 5909412 | Method for reproducing optical disk | Junichiro Nakayama, Naoyasu Iketani, Michinobu Mieda, Akira Takahashi | 1999-06-01 |
| 5901118 | Magneto-optical recording medium having a readout layer and a recording layer | Naoyasu Iketani, Junji Hirokane, Akira Takahashi | 1999-05-04 |
| 5824426 | Magneto-optical recording medium | Naoyasu Iketani, Akira Takahashi, Kenji Ohta | 1998-10-20 |