Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6466385 | Method and apparatus of forming a magnetic disk with a servo sector and a data sector on a spiral track | Yoshio Umeda, Ryosuke Shimizu, Syuichi Yoshida, Kiyokazu Tohma, Keizo Miyata | 2002-10-15 |
| 6347016 | Master information carrier, process for producing the carrier, and method and apparatus for recording master information signal on magnetic recording medium by using the carrier | Ryuji Sugita, Kiyokazu Tohma, Keizou Miyata, Hiroshi Ryonai | 2002-02-12 |