Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4811142 | Magnetic head for vertical magnetic recording and method of producing same | Keishi Nakashima, Tetsuya Iwata, Yasuo Tanaka | 1989-03-07 |
| 4768121 | Magnetic head formed by composite main pole film and winding core for perpendicular magnetic recording | Keishi Nakashima, Tetsuya Iwata, Yasuo Tanaka | 1988-08-30 |