Top Inventors at Hitachi Service Engineering Co. All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Tadasi Sonobe | 5 |
| 2 | Manabu Matsumoto | 4 |
| 3 | Takashi Ikeguchi | 4 |
| #4 | Kazuo Kuroishi | 3 |
| #5 | Satoshi Ido | 3 |
| #6 | Shinjiroo Ueda | 3 |
| #7 | Toru Murashita | 3 |
| #8 | Akinori Shibayama | 2 |
| #9 | Hidetoshi Hamaoka | 1 |
| #10 | Hidenori Inoue | 1 |
| #11 | Hidesumi Kuwashima | 1 |
| #12 | Hiroshi Ohta | 1 |
| #13 | Kazuo Suzuki | 1 |
| #14 | Kazuaki Yoshikawa | 1 |
| #15 | Kenzyu Ogiwara | 1 |
| #16 | Kiyoshi Chiba | 1 |
| #17 | Minoru Kawada | 1 |
| #18 | Naohiro Momma | 1 |
| #19 | Noriaki Mase | 1 |
| #20 | Noboru Suzuki | 1 |
| #21 | Shunji Kakiuchi | 1 |
| #22 | Shigeru Takahashi | 1 |
| #23 | Shinjiro Ueda | 1 |
| #24 | Takuya Fukuda | 1 |
| #25 | Teiji Ashida | 1 |
| #26 | Toshiaki Kobari | 1 |
| #27 | Tsuguaki Koga | 1 |
| #28 | Yasuhiro Mochizuki | 1 |
| #29 | Yoshiaki Kazawa | 1 |
| #30 | Yuichi Matsumura | 1 |
| #31 | Kazuo Kuroichi | 1 |