Top Inventors at Sugan Co. All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Tetsuya Yamamoto | 10 |
| 2 | Tomio Sugahara | 4 |
| 3 | Michihiko Matsushima | 2 |
| #4 | Atsushi Sugahara | 1 |
| #5 | Masayoshi Yokoyama | 1 |
| #6 | Takamasa Onuki | 1 |
| Rank | Name | Patents |
|---|---|---|
| 1 | Tetsuya Yamamoto | 10 |
| 2 | Tomio Sugahara | 4 |
| 3 | Michihiko Matsushima | 2 |
| #4 | Atsushi Sugahara | 1 |
| #5 | Masayoshi Yokoyama | 1 |
| #6 | Takamasa Onuki | 1 |