Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8004143 | Carbon brush of motor and method for producing the same | — | 2011-08-23 |
| 5552652 | Commutator with improved connection between carbon and metal segments | Shuji Shimoyama | 1996-09-03 |