Top Inventors at Nippon Graphite Industries Co. All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Katsuhiro Murata | 5 |
| 2 | Mitsumasa Shibata | 4 |
| 3 | Tadaaki Isono | 4 |
| #4 | Toru Hatakeyama | 2 |
| #5 | Hiroshi Shiba | 1 |
| #6 | Hiromi Takagi | 1 |
| #7 | Hitoshi Tsuchida | 1 |
| #8 | Kazuo Yamazaki | 1 |
| #9 | Mamoru Ashida | 1 |
| #10 | Masayuki Furukawa | 1 |
| #11 | Tadashi Dohi | 1 |
| #12 | Tadao Ohkura | 1 |
| #13 | Tadao Okura | 1 |
| #14 | Takafumi Uemiya | 1 |
| #15 | Tomoyuki Hatano | 1 |