Top Inventors at Maruwa Co. All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Ikuo Nishi | 4 |
| 2 | Sei Kanbe | 3 |
| 3 | Yoshio Tanabe | 3 |
| #4 | Daisuke Kato | 2 |
| #5 | Fumiya Kobayashi | 2 |
| #6 | Mitsutaka Takahashi | 2 |
| #7 | Nobukazu Koizumi | 2 |
| #8 | Toshiro Kanbe | 2 |
| #9 | Tsutomu Amano | 2 |
| #10 | Yoshinori Izukura | 2 |
| #11 | Fuyuki Ito | 1 |
| #12 | Genki Hirashima | 1 |
| #13 | Hideaki Adachi | 1 |
| #14 | Kazuhisa Toyofuku | 1 |
| #15 | Kazuhiro Ushita | 1 |
| #16 | Keiichiro Hayashi | 1 |
| #17 | Kiminori Hori | 1 |
| #18 | Masaaki Tanaka | 1 |
| #19 | Makoto Yamaguchi | 1 |
| #20 | Sho Kumagai | 1 |
| #21 | Sota Nagashima | 1 |
| #22 | Tadahiro Nishigawa | 1 |
| #23 | Tadashi Onishi | 1 |
| #24 | Tomonori Ishigaki | 1 |
| #25 | Tsutomu Matsuhira | 1 |
| #26 | Tsutomu Yamaoka | 1 |
| #27 | Yasushi Kojima | 1 |
| #28 | Megumi Nagaya | 1 |