Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5603667 | Golf club head | Hiroshi Ezaki, Ryohei Uji, Hirato Shimasaki, Masaomi Hiruta, Hideyuki Ishii | 1997-02-18 |
| 5386996 | Golf club head | Masaomi Hiruta, Ikuo Aoki, Ryohei Uji, Hirato Shimasaki, Hiroshi Ezaki +1 more | 1995-02-07 |
| 4896885 | Golf club | Ryota Kajita | 1990-01-30 |
| 4895367 | Golf club set | Ryota Kajita | 1990-01-23 |
| 4713686 | High speed instantaneous multi-image recorder | Haruhiko Ozaki, Tadatoshi Yamada, Kunio Machida, Kiyoshi Ohno, Hirato Shimazaki +1 more | 1987-12-15 |