Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8955454 | Rowing boat footrest assembly | Yuji Kawahara | 2015-02-17 |
| 8141274 | Rowing shoe | Keiji Matsueda, Satoshi Watanabe | 2012-03-27 |
| D636564 | Rowing shoe | Keiji Matsueda, Satoshi Watanabe | 2011-04-26 |
| 7552695 | Rowing boat footrest assembly | Keiji Matsueda, Yasushi Nakamura | 2009-06-30 |