Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9984715 | Magnetic disk and manufacturing method thereof | Koichi Shimokawa, Katsushi Hamakubo | 2018-05-29 |
| 9558778 | Lubricant compound for magnetic disk and magnetic disk | Kota Suzuki, Koichi Shimokawa, Katsushi Hamakubo | 2017-01-31 |
| 9245568 | Magnetic disk and method of manufacturing the same | Katsushi Hamakubo | 2016-01-26 |
| 9177586 | Magnetic disk and manufacturing method thereof | Koichi Shimokawa, Katsushi Hamakubo | 2015-11-03 |
| 9005782 | Magnetic disk and method of manufacturing the same | Katsushi Hamakubo | 2015-04-14 |
| 8920872 | Method of producing a magnetic recording disc | Katsushi Hamakubo, Koichi Shimokawa | 2014-12-30 |
| 8846137 | Method of manufacturing a magnetic disk | Koichi Shimokawa, Katsushi Hamakubo | 2014-09-30 |
| 8697262 | Lubricant for magnetic disc, magnetic disc and method of producing the same | Katsushi Hamakubo, Koichi Shimokawa | 2014-04-15 |
| 8492011 | Lubricant compound for a magnetic disk, magnetic disk, and method of manufacturing the same | Katsushi Hamakubo, Koichi Shimokawa | 2013-07-23 |