Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9174497 | Pneumatic tire with tread having chamfered circumferential groove portion of bent auxiliary groove | Kensuke Dobashi, Takaaki Kojima, Shungo Fujita, Shu Nagai | 2015-11-03 |
| D644595 | Tread portion of an automobile tire | Takaaki Kojima | 2011-09-06 |