Issued Patents All Time
Showing 26–50 of 58 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6111822 | Magnetic head with large cross-sectional area core for use with magnetically induced super resolution medium and magneto optical recording apparatus | — | 2000-08-29 |
| 6001467 | Magneto-optic memory medium | Kenji Ohta, Akira Takahashi, Yoshiteru Murakami, Junichiro Nakayama | 1999-12-14 |
| 5828512 | Information processing apparatus having a floating-type head | Katsuo Wada, Miyuki Onishi, Junichiro Nakayama, Takashi Iwaki, Takeshi Yamaguchi | 1998-10-27 |
| 5774428 | Method and apparatus for magneto-optical recording or reproducing using modulated magnetic field | Nobuo Ogata, Kunio Kojima | 1998-06-30 |
| 5724319 | Magneto-optical recording apparatus having transient response correction for magnetic head coil currents | Hiroshi Fuji, Shigeo Terashima | 1998-03-03 |
| 5673247 | Optical pickup having two objective lenses | Yoshihiro Sekimoto, Yasuo Nakata, Nobuo Ogata | 1997-09-30 |
| 5659528 | Information recording-reproduction method | Kunio Kojima, Yoshihiro Sekimoto, Yasuo Nakata, Nobuo Ogata, Toshiharu Inui | 1997-08-19 |
| 5585159 | Recording medium capable of suppressing resonance from recording and reproducing devices | Toshiyuki Tanaka | 1996-12-17 |
| 5500839 | Multiple coil magnetic head for magnetic optical recording device | Toshiharu Inui, Jun Akiyama, Kunio Kojima | 1996-03-19 |
| 5457006 | Method of manufacturing photo-mask and photo-mask manufactured thereby | Junji Hirokane, Hiroyuki Katayama, Akira Takahashi, Tetsuya Inui, Kenji Ohta +3 more | 1995-10-10 |
| 5386400 | Magneto-optical head device having a lubricated member | Junichiro Nakayama, Hiroyuki Katayama, Kenji Ohta | 1995-01-31 |
| 5343448 | External magnetic field device for a magnetooptical information recording and reproducing apparatus | Hiroyuki Katayama, Junichiro Nakayama, Takahiro Miyake, Kenji Ohta, Shozo Kobayashi | 1994-08-30 |
| 5338646 | Optical memory device having an improved light reflection or optical memory layer | Junichiro Nakayama, Hiroyuki Katayama, Kazuo Van, Kenji Ohta | 1994-08-16 |
| 5313445 | Reproducing apparatus with suspension supporting a floating-type head with a bevelled slider | Katsuo Wada, Miyuki Onishi, Junichiro Nakayama, Takashi Iwaki, Takeshi Yamaguchi | 1994-05-17 |
| 5313444 | External magnetic field generation apparatus capable of light intensity modulation and magnetic field modulation | Mitsuo Ishii | 1994-05-17 |
| 5303100 | Magnetic disk device with floating-type magnetic head | Junichiro Nakayama, Hiroyuki Katayama, Kenji Ohta | 1994-04-12 |
| 5270994 | Magneto-optical recording and reading method | Junichiro Nakayama, Hiroyuki Katayama, Kenji Ohta | 1993-12-14 |
| 5231613 | Magneto-optical recording device | Junichiro Nakayama, Hiroyuki Katayama, Kenji Ohta | 1993-07-27 |
| 5224068 | Recording method for magneto-optic memory medium | Mitsuo Ishii, Hiroyuki Katayama, Kenji Ohta | 1993-06-29 |
| 5214636 | Optical recording element having a plurality of thin film filtering layers and optical recording element having an electrically conductive layer | Toshio Ishikawa, Hiroyuki Katayama, Kazuo Van, Junichiro Nakayama, Kenji Ohta +1 more | 1993-05-25 |
| 5193082 | Optical/magnetic composite head having magnetic and optical heads in one integrated unit | Junichiro Nakayama, Hiroyuki Katayama, Akira Takahashi, Kenji Ohta | 1993-03-09 |
| 5175721 | Magneto-optical recording and reading device with initilization | Junichiro Nakayama, Hiroyuki Katayama, Kenji Ohta | 1992-12-29 |
| 5157568 | Floating type magnetic head device | Hiroyuki Katayama, Junichiro Nakayama, Kenji Ohta | 1992-10-20 |
| 5107471 | Magnetic head having a rectangular configuration for use in a magneto-optical recording system | Kenji Ohta, Hiroyuki Katayama, Junichiro Nakayama | 1992-04-21 |
| 5095350 | Magneto-optic memory medium | Kenji Ohta, Akira Takahashi, Hiroyuki Katayama, Tomokazu Ise, Junichiro Nakayama | 1992-03-10 |