Patents per Year
Top Inventors at Denken Co. All Time
Showing 1–6 of 6 inventors
| Rank | Name | Patents |
|---|---|---|
| 1 | Masaki Usui | 4 |
| 2 | Kazuhiro Watanabe | 3 |
| 2 | Mamoru Aihara | 3 |
| 2 | Manabu Takahashi | 3 |
| 2 | Toshio Shimizu | 3 |
| 2 | Yasuharu Hakamatsuka | 3 |
Most Valuable Patents
| Patent | Est. Value | Year |
|---|---|---|
| Centrifugal casting device | $861K | 1988 |