Top Inventors at Napra Co. All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Shigenobu Sekine | 43 |
| 2 | Yurina Sekine | 26 |
| 3 | Yoshiharu Kuwana | 10 |
| #4 | Ryuji Kimura | 3 |
| #5 | Chihiro Shimaya | 2 |
| #6 | Hiroaki Ikeda | 2 |
| #7 | Kazutoshi Kamibayashi | 2 |
| Rank | Name | Patents |
|---|---|---|
| 1 | Shigenobu Sekine | 43 |
| 2 | Yurina Sekine | 26 |
| 3 | Yoshiharu Kuwana | 10 |
| #4 | Ryuji Kimura | 3 |
| #5 | Chihiro Shimaya | 2 |
| #6 | Hiroaki Ikeda | 2 |
| #7 | Kazutoshi Kamibayashi | 2 |