Top Inventors at Hitachi Aic All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Masayuki Sakurai | 4 |
| 2 | Kazumitsu Ishikawa | 3 |
| 3 | Ryouji Sugiura | 3 |
| #4 | Hiroyuki Kudoh | 2 |
| #5 | Satoshi Isoda | 2 |
| #6 | Haruo Suzuki | 1 |
| #7 | Hiroyoshi Yokoyama | 1 |
| #8 | Hideki Yoshida | 1 |
| #9 | Kenichi Masuda | 1 |
| #10 | Koichi Noguchi | 1 |
| #11 | Shoji Oikawa | 1 |
| #12 | Takanori Nishida | 1 |
| #13 | Toshiro Okamura | 1 |
| #14 | Yasuhiro Iwasaki | 1 |
| #15 | Yasuaki Nakamura | 1 |
| #16 | Youiti Matuda | 1 |
| #17 | Tsutomu Zama | 1 |
| #18 | Kenshirou Fukuzato | 1 |