Top Inventors at Hitachi Tool Engineering All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Kazuyuki Kubota | 6 |
| 2 | Katsutoshi Maeda | 4 |
| 3 | Takeshi Ishikawa | 4 |
| #4 | Yoshimitsu Nagashima | 4 |
| #5 | Nobuhiko Shima | 3 |
| #6 | Gang Han | 2 |
| #7 | Katsuhiko Kojo | 2 |
| #8 | Ryosuke Okanishi | 2 |
| #9 | Takahito Kuroda | 2 |
| #10 | Yuuzoh Fukunaga | 2 |
| #11 | Yusuke Iyori | 2 |
| #12 | Yuichi Nakahara | 2 |
| #13 | Fumihiro Fujii | 1 |
| #14 | Fumihiko Inagaki | 1 |
| #15 | Haruhisa Higasayama | 1 |
| #16 | Hayato Takahashi | 1 |
| #17 | Hisaaki Ida | 1 |
| #18 | Hisanori Mura | 1 |
| #19 | Hitoshi Ohnuma | 1 |
| #20 | Hideaki Onozuka | 1 |
| #21 | Hiroshi Ueda | 1 |
| #22 | Kazuyoshi Sasaki | 1 |
| #23 | Kenichi Inoue | 1 |
| #24 | Keiji Ishikawa | 1 |
| #25 | Makoto Baba | 1 |
| #26 | Masayuki Gonda | 1 |
| #27 | Masakazu Isaka | 1 |
| #28 | Osamu Goto | 1 |
| #29 | Shirou Okayama | 1 |
| #30 | Syuuhou Koseki | 1 |
| #31 | Takeshi Akamatsu | 1 |
| #32 | Toshio Ishii | 1 |
| #33 | Tomu Katou | 1 |
| #34 | Tomohiro Murata | 1 |
| #35 | Yasuhiro Kiuchi | 1 |
| #36 | Yasushi Sakamoto | 1 |
| #37 | Yoshio Kimura | 1 |
| #38 | Yoshiyuki Kobayashi | 1 |
| #39 | Yoshihiro Kondoh | 1 |
| #40 | Yuuki Hayashi | 1 |
| #41 | Akibumi Negishi | 1 |