Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6702466 | Ceramic dynamic-pressure bearing, motor having bearing, hard disk drive, polygon scanner, and method for manufacturing ceramic dynamic-pressure bearing | Hironobu Ishikawa, Junya Moribe | 2004-03-09 |
| 6696376 | Zirconia containing ceramic ball, method for manufacturing same, ceramic ball bearing and check valve | Tomonori Niwa | 2004-02-24 |
| 6659647 | Ceramic dynamic pressure bearing, motor with bearing, hard disk device, and polygon scanner | Atsutoshi Sugiyama, Hironobu Ishikawa | 2003-12-09 |
| 6619847 | Ceramic dynamic-pressure bearing, motor having bearing, hard disk drive, and polygon scanner | Hironobu Ishikawa | 2003-09-16 |
| 6619848 | Ceramic dynamic pressure bearing, motor with bearing, hard disc apparatus and polygon scanner | Hironobu Ishikawa, Takayoshi Morishita | 2003-09-16 |
| 6589448 | Ceramic ball for bearing and ceramic ball bearing using the same | Tomonori Niwa | 2003-07-08 |
| 6508591 | Conductive ceramic bearing ball, ball bearing, motor having bearing, hard disk drive, and polygon scanner | Tomonori Niwa | 2003-01-21 |
| 6464906 | Method of manufacturing spherical bodies by rotation, spherical bodies made by the method and a powder composition for use in the method | Tomonori Niwa | 2002-10-15 |
| 5994250 | Sintered ceramic bodies and ceramic working tools | Keiji Suzuki, Takayoshi Morishita | 1999-11-30 |
| 5916833 | Sintered ceramic bodies and ceramic metal working tools | Keiji Suzuki, Takayoshi Morishita | 1999-06-29 |
| 5600867 | Car kiln wheel having silicon nitride rotating members | Tomonori Niwa | 1997-02-11 |
| 5106550 | Method of producing ceramic rotor | Yoshinori Hattori, Motohide Ando, Yasushi Katano | 1992-04-21 |