Top Inventors at Hitachi Setsubi Engineering Co. All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Hiroshi Akiyama | 4 |
| 2 | Hidehito Asano | 4 |
| 3 | Tsutomu Yamashita | 4 |
| #4 | Yutaka Muramatsu | 4 |
| #5 | Wataru Sagawa | 3 |
| #6 | Atsuo Suzuki | 1 |
| #7 | Haruo Koharagi | 1 |
| #8 | Hiroyuki Sadamori | 1 |
| #9 | Hiroshi Saga | 1 |
| #10 | Hiroyuki Tadokoro | 1 |
| #11 | Junichi Yamashita | 1 |
| #12 | Kazuo Tahara | 1 |
| #13 | Kazuhiro Wakamatsu | 1 |
| #14 | Kyouichi Kawasaki | 1 |
| #15 | Masao Nakaki | 1 |
| #16 | Mitsuhiro Nitobe | 1 |
| #17 | Mitsuo Suzuki | 1 |
| #18 | Nobutaka Suzuki | 1 |
| #19 | Seiji Yonekura | 1 |
| #20 | Shigeji Kaneko | 1 |
| #21 | Shin Nakamura | 1 |
| #22 | Susumu Aoyama | 1 |
| #23 | Yoshiyuki Nakamura | 1 |
| #24 | Yuuji Hosoda | 1 |