Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10607647 | Magnetic disk substrate with specified changes in height or depth between adjacent raised or lowered portions and an offset portion on a main surface within a range of 92.0 to 97.0% in a radial direction from a center, a magnetic disk with substrate and magnetic disk device | Toshio Takizawa, Kenichi Nishimori | 2020-03-31 |
| 9697861 | Magnetic disk substrate with specified changes in height or depth between adjacent raised or lowered portions and an offset portion on a main surface within a range of 92.0 to 97.0% in a radial direction from a center, a magnetic disk with substrate and a magnetic disk device with magnetic disk | Toshio Takizawa, Kenichi Nishimori | 2017-07-04 |
| 9183866 | Magnetic disk substrate with offset portion on a main surface within a range of 92.0 to 97.0% in a radial direction from a center, magnetic disk with substrate and magnetic disk device | Toshio Takizawa, Kenichi Nishimori | 2015-11-10 |
| 8986859 | Magnetic disk substrate, magnetic disk, and magnetic disk device | Toshio Takizawa, Kenichi Nishimori | 2015-03-24 |
| 8640497 | Method of manufacturing glass substrate for magnetic disk and system for manufacturing glass substrate for magnetic disk | Ryuuichi Kashima, Hideki Isono, Shinji Eda, Tomotaka Yokoyama, Tadashi Tomonaga +1 more | 2014-02-04 |