Patents per Year
Top Inventors at Risho Kogyo Co. All Time
Showing 1–13 of 13 inventors
| Rank | Name | Patents |
|---|---|---|
| 1 | Goro Matsui | 2 |
| 1 | Koichi Tokura | 2 |
| 3 | Masazumi Tayake | 1 |
| 3 | Katsuyoshi Kiba | 1 |
| 3 | Kazunori Takeguchi | 1 |
| 3 | Kikuko Matsuoka | 1 |
| 3 | Kiyoshi Terasaka | 1 |
| 3 | Kohji Hirata | 1 |
| 3 | Sumio Sakka | 1 |
| 3 | Tadashi Moriya | 1 |
| 3 | Yoshifumi Miyake | 1 |
| 3 | Yoshitaka Ohashi | 1 |
| 3 | Yuichi Aoyama | 1 |