Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10697495 | Iron-copper-based oil-impregnated sintered bearing and method for manufacturing same | Yoshinari Ishii, Tomoe Obata | 2020-06-30 |
| 10428873 | Iron-copper-based oil-impregnated sintered bearing and method for manufacturing same | Yoshinari Ishii, Tomoe Obata | 2019-10-01 |
| 9476453 | Cu-based oil-impregnated sintered bearing | Yoshinari Ishii | 2016-10-25 |
| 8034956 | Ionic liquid and method for producing the same, method for forming oxide film on metal surface, electrolyte capacitor and electrolyte | Masamitsu Tachibana, Hiroyuki Furutani, Hideo Yamagishi, Mutsuaki Murakami | 2011-10-11 |
| 7504765 | Piezoelectric transformer and the method for manufacturing the same | Hiroshi Ohki | 2009-03-17 |