Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D618297 | Golf club shaft | Tsutomu Ibuki, Kiyoyuki Kamiguchi | 2010-06-22 |
| D606147 | Golf club shaft | Tsutomu Ibuki, Kiyoyuki Kamiguchi | 2009-12-15 |
| D602108 | Golf club shaft | Tsutomu Ibuki, Kiyoyuki Kamiguchi | 2009-10-13 |
| 5820011 | Ultrasonic tool horn | Masaya Ito, Haruo Yamamori, Tomoo Tanaka | 1998-10-13 |
| 5073085 | Ceramic turbocharger rotor | Masaya Ito | 1991-12-17 |
| 5001019 | Joined ceramic and metal | Masaya Ito | 1991-03-19 |