Top Inventors at Usui Co. All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Shuji Suzuki | 6 |
| 2 | Hidetaka Ito | 5 |
| 3 | Tetsunobu Suzuki | 5 |
| #4 | Hiroyuki Nishizawa | 3 |
| #5 | Koichi Hayashi | 3 |
| #6 | Taizo Makino | 3 |
| #7 | Tatsuya Masuda | 3 |
| #8 | Hiroaki Kondo | 2 |
| #9 | Kazuma Hinobayashi | 2 |
| #10 | Katsunori Nagao | 2 |
| #11 | Kazuhiro Serizawa | 2 |
| #12 | Masahiro Yamazaki | 2 |
| #13 | Tsugumi Yamazaki | 2 |
| #14 | Yoshiyuki Serizawa | 2 |
| #15 | Hiroshi Matsumoto | 1 |
| #16 | Hiroki Sugawara | 1 |
| #17 | Hironobu Tsutano | 1 |
| #18 | Iichiro Seino | 1 |
| #19 | Junji Takehara | 1 |
| #20 | Kengo Murofushi | 1 |
| #21 | Masakazu Koike | 1 |
| #22 | Masahiro Komaki | 1 |
| #23 | Naoki Serizawa | 1 |
| #24 | Osamu Endo | 1 |
| #25 | Ryurou Kurahashi | 1 |
| #26 | Satoshi Kubota | 1 |
| #27 | Takanori Kanda | 1 |
| #28 | Takumi Yoshida | 1 |
| #29 | Tomohiko Omura | 1 |
| #30 | Tsutomu Okuyama | 1 |
| #31 | Vishal Shah | 1 |
| #32 | Yoshihisa Fukutome | 1 |
| #33 | Yuji Arai | 1 |
| #34 | Akio Tagami | 1 |