Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5033530 | High pressure casting sand core and method of manufacturing the same | Yoshiaki Egoshi, Jyoji Umeda | 1991-07-23 |
| 4602787 | Hollow metal golf club head | Hiroshi Kobayashi | 1986-07-29 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5033530 | High pressure casting sand core and method of manufacturing the same | Yoshiaki Egoshi, Jyoji Umeda | 1991-07-23 |
| 4602787 | Hollow metal golf club head | Hiroshi Kobayashi | 1986-07-29 |