Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5469769 | Soundboard for musical instruments | Shuichi Sawada, Katsuhiko Imagawa | 1995-11-28 |
| 4718964 | Method for producing sound bar for percussive musical instruments | Shuichi Sawada | 1988-01-12 |
| 4649791 | Sound bar for percussive musical instruments and a method for producing same | Shuichi Sawada | 1987-03-17 |
| 4624460 | Golf club head | Seiya Nishimura, Osamu Tomita | 1986-11-25 |
| 4545580 | Wood-type golf club head | Osamu Tomita, Seiya Nishimura | 1985-10-08 |