Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5912783 | Magnetic recording and reproducing apparatus having ring-type magnetic head with metallic soft magnetic films of differing thicknesses | Tatsuaki Ishida, Ryuji Sugita, Hiroyuki Hasegawa | 1999-06-15 |
| 5901012 | Magnetic recording and reproduction apparatus ring-type magnetic head for recording signals to recording medium having oblique axis of easy magnetization | Tatsuaki Ishida, Ryuji Sugita | 1999-05-04 |
| 5739973 | Apparatus for recording a mixed video and tracking signal on a magnetic recording medium | — | 1998-04-14 |
| 5670107 | Method for producing magnetic recording medium | Kenji Kuwahara, Kiyosi Takahasi, Hideyuki Ueda, Mikio Murai, Masaru Odagiri | 1997-09-23 |