Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10648503 | Thrust bearing and bearing device | Takashi Koyama, Tsutomu Kubota, Tadashi Namba | 2020-05-12 |
| 10294987 | Bearing device for crankshaft | Takashi Koyama, Tsutomu Kubota | 2019-05-21 |