Top Inventors at Japan Drilling Co. All Time
Showing 1–16 of 16 inventors
| Rank | Name | Patents |
|---|---|---|
| 1 | Toshio Kobayashi | 3 |
| 2 | Hiromitsu Yamamoto | 2 |
| 2 | Kazuyoshi Takayama | 2 |
| #4 | Eiji Kogure | 1 |
| #4 | Eiji Takemae | 1 |
| #4 | Hiroyasu ISHIGURO | 1 |
| #4 | Kazuhisa Otomo | 1 |
| #4 | Ken Ueda | 1 |
| #4 | Kiyonobu Ohtani | 1 |
| #4 | Kozo Ishida | 1 |
| #4 | Masahiro Nakamura | 1 |
| #4 | Saburo Goto | 1 |
| #4 | Satoru Umezu | 1 |
| #4 | Shohei Kato | 1 |
| #4 | Shigehito Uetake | 1 |
| #4 | Takeyoshi Nozawa | 1 |