Top Inventors at Maruyama Mfg. Co. All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Katsumi Kiyooka | 11 |
| 2 | Terutaka Yasuda | 10 |
| 3 | Junichi Miyamoto | 9 |
| #4 | Toshihisa Nemoto | 9 |
| #5 | Kaori Katoh | 8 |
| #6 | Nobuo Tojo | 5 |
| #7 | Kazuhiro Yoshida | 4 |
| #8 | Masaya Hashimoto | 3 |
| #9 | Shinji Ohwaku | 3 |
| #10 | Toshiaki Ohnishi | 3 |
| #11 | Yoichi Ishikawa | 3 |
| #12 | Kazuhiro Isayama | 2 |
| #13 | Keiichi Moriya | 2 |
| #14 | Kousuke Kawaguchi | 2 |
| #15 | Kouichi Shinotsuka | 2 |
| #16 | Toshiro Nakanishi | 2 |
| #17 | Atsushi Shibazaki | 1 |
| #18 | Eiji Matsuoka | 1 |
| #19 | Eiji Yanagi | 1 |
| #20 | Hirofumi Mukai | 1 |
| #21 | Katsutoshi Inagaki | 1 |
| #22 | Kazuyuki Kawana | 1 |
| #23 | Kiyoshi Takei | 1 |
| #24 | Masayoshi Goto | 1 |
| #25 | Minoru Araki | 1 |
| #26 | Nozomu Sasaki | 1 |
| #27 | Nobuhiro Yuhashi | 1 |
| #28 | Ryohey Aoyama | 1 |
| #29 | Setsu Maruyama | 1 |
| #30 | Shingo Maru | 1 |
| #31 | Shigeru Maruyama | 1 |
| #32 | Shigeki Namekata | 1 |
| #33 | Takayuki Kaneko | 1 |
| #34 | Takeo Miyamoto | 1 |
| #35 | Tetsunari Ochiai | 1 |
| #36 | Toshihide Ito | 1 |
| #37 | Yoshisada Furukawa | 1 |
| #38 | Yoichi Shimizu | 1 |
| #39 | Kouichi Shinoisuka | 1 |
| #40 | Akiko Sasaki | 1 |