Top Inventors at Tsukasa Co. All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Fumio Kato | 6 |
| 2 | Tomonori Seki | 5 |
| 3 | Yoshio Sakakibara | 2 |
| #4 | Koji Fukushima | 1 |
| #5 | Yasuhiro Ikeda | 1 |
| Rank | Name | Patents |
|---|---|---|
| 1 | Fumio Kato | 6 |
| 2 | Tomonori Seki | 5 |
| 3 | Yoshio Sakakibara | 2 |
| #4 | Koji Fukushima | 1 |
| #5 | Yasuhiro Ikeda | 1 |