Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8323071 | Method of polishing the inner peripheral end surfaces of substrates for a recording medium using a brush | Hiroyuki Machida | 2012-12-04 |
| 8029687 | Polishing slurry, production method of glass substrate for information recording medium and production method of information recording medium | Hiroyuki Machida, Kazuyuki Haneda | 2011-10-04 |
| 7855002 | Magnetic disk substrate and magnetic recording medium thereof | Hiroyuki Machida | 2010-12-21 |
| 7727645 | Substrate for magnetic recording medium, magnetic recording medium, and magnetic recording and reproducing apparatus | Masato Fukushima, Kenji Shimizu | 2010-06-01 |
| 7700205 | Process for manufacturing glass substrate for magnetic recording medium, glass substrate for magnetic recording medium obtained by the process, and magnetic recording medium obtained using the substrate | Hiroyuki Machida, Kazuyuki Haneda | 2010-04-20 |
| 7662493 | Magnetic disk substrate and production method of magnetic disk | Hiroyuki Machida, Kazuyuki Haneda | 2010-02-16 |
| 7624594 | Magnetic recording medium substrate and manufacturing method therefor, magnetic recording medium, and magnetic recording and reproducing device | Yukihisa Matsumura | 2009-12-01 |
| 7622206 | Silicon substrate for magnetic recording medium and magnetic recording medium | Hiroyuki Machida, Kazuyuki Haneda | 2009-11-24 |
| 7531043 | Magnetic disk substrate and production method of magnetic disk | Hiroyuki Machida | 2009-05-12 |