Issued Patents All Time
Showing 26–50 of 68 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5909412 | Method for reproducing optical disk | Junichiro Nakayama, Naoyasu Iketani, Yoshiteru Murakami, Akira Takahashi | 1999-06-01 |
| 5838645 | Magneto-optical recording medium having a plurality of magnetic layers | Junji Hirokane, Junichiro Nakayama, Akira Takahashi | 1998-11-17 |
| 5822282 | Magneto-optical recording medium having a plurality of magnetic layers for use in light modulation technique | Junichiro Nakayama, Junji Hirokane, Akira Takahashi | 1998-10-13 |
| 5787056 | Magneto-optical recording medium with multiple magnetic layers | Junichiro Nakayama, Junji Hirokane, Akira Takahashi | 1998-07-28 |
| 5754523 | Optical memory medium with preformed pit arrangement | Toshihisa Deguchi, Kenji Ohta, Akira Takahashi, Kazuo Van, Tetsuya Inui | 1998-05-19 |
| 5719831 | Magneto-optical recording medium cartridge which employs magnets | Junichiro Nakayama, Hiroyuki Katayama, Akira Takahashi, Kenji Ohta | 1998-02-17 |
| 5707727 | Magneto-optical recording medium | Akira Takahashi, Yoshiteru Murakami, Junsaku Nakajima, Kenji Ohta, Junichiro Nakayama +1 more | 1998-01-13 |
| 5684764 | Magneto-optical recording medium having a plurality of magnetic layers | Junji Hirokane, Junichiro Nakayama, Akira Takahashi | 1997-11-04 |
| 5683803 | Magneto-optical recording medium and method of recording and reproducing using the same | Junichiro Nakayama, Junji Hirokane, Akira Takahashi, Kenji Ohta | 1997-11-04 |
| 5676854 | Optical memory having narrowed track pitch | Tetsuya Inui, Akira Takahashi, Kenji Ohta, Yoshiteru Murakami | 1997-10-14 |
| 5673250 | Optical recording medium having pit rows on every other boundary and reproducing method thereof | Junji Hirokane, Akira Takahashi, Kenji Ohta, Shigeo Terashima | 1997-09-30 |
| 5665467 | Magneto-optical recording medium | Junichiro Nakayama, Hiroyuki Katayama, Akira Takahashi, Kenji Ohta | 1997-09-09 |
| 5666332 | Magneto-optical recording medium permitting an initializing magnetic field smaller than a recording magnetic field, and method of recording there on | Junichiro Nakayama, Junji Hirokane, Akira Takahashi | 1997-09-09 |
| 5659537 | Magneto-optical recording medium and method of reproducing from same | Junji Hirokane, Junichiro Nakayama, Akira Takahashi | 1997-08-19 |
| 5644566 | Magneto-optical recording medium | Junichiro Nakayama, Hiroyuki Katayama, Junji Hirokane, 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 | Junji Hirokane, Junichiro Nakayama, Akira Takahashi | 1997-06-17 |
| 5635296 | Magneto-optical recording medium whereon overwriting is permitted by light intensity modulation | Junichiro Nakayama, Hiroyuki Katayama, Akira Takahashi, Kenji Ohta | 1997-06-03 |
| 5633838 | Magneto-optical recording medium having two reproduction layers and a method for reproducing thereof | Junji Hirokane, Junichiro Nakayama, Akira Takahashi | 1997-05-27 |
| 5629908 | Magneto-optical recording medium having magnetization variable between in-plane magnetization and perpendicular magnetization | Junji Hirokane, Junichiro Nakayama, Akira Takahashi | 1997-05-13 |
| 5615180 | Magneto-optical recording medium and magneto-optical recording apparatus capable of performing a light-modulation overwriting operation | Junichiro Nakayama, Hiroyuki Katayama, Akira Takahashi, Kenji Ohta | 1997-03-25 |
| 5586109 | Optical memory having narrowed track pitch | Tetsuya Inui, Akira Takahashi, Kenji Ohta, Yoshiteru Murakami | 1996-12-17 |
| 5530685 | Magneto-optical recording apparatus having paired devices for applying external magnetic fields | Hiroyuki Katayama, Junichiro Nakayama, Junji Hirokane, Akira Takahashi, Kenji Ohta | 1996-06-25 |
| 5498485 | Magneto-optical recording medium and manufacturing method thereof | Junichiro Nakayama, Hiroyuki Katayama, Junji Hirokane | 1996-03-12 |
| 5490131 | Optical disk | Kenji Ohta, Toshikazu Nagaura, Masayasu Futagawa, Shinji Yamagami, Yoshiteru Murakami +3 more | 1996-02-06 |
| 5459711 | Optical recording element and driving system | Kenji Ohta, Tetsuya Inui, Hiroyuki Katayama, Akira Takahashi, Junji Hirokane +2 more | 1995-10-17 |