Top Inventors at Maruo Calcium Co. All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Shiro Minayoshi | 12 |
| 2 | Hisakazu Hojo | 10 |
| 3 | Hidemitsu Kasahara | 9 |
| #4 | Shigeo Takiyama | 9 |
| #5 | Naoki Kubota | 7 |
| #6 | Hidehiko Nishioka | 6 |
| #7 | Minoru Hanazaki | 6 |
| #8 | Seiya Shimizu | 6 |
| #9 | Mitsunobu Aoyama | 5 |
| #10 | Hiroshi Shibata | 4 |
| #11 | Katsunori Fukumoto | 3 |
| #12 | Kouhei Sako | 3 |
| #13 | Naofumi Saito | 3 |
| #14 | Naofumi Saitoh | 3 |
| #15 | Noritsugu Ebisuya | 3 |
| #16 | Yoichi Takahashi | 3 |
| #17 | Makoto Nagamatsu | 2 |
| #18 | Masako Takahashi | 2 |
| #19 | Nariatsu Uto | 2 |
| #20 | Norimasa Maida | 2 |
| #21 | Sakae Kuroda | 2 |
| #22 | Shigeru Sakaguchi | 2 |
| #23 | Takeshi Maeba | 2 |
| #24 | Toshio Fujiwara | 2 |
| #25 | Toshio Higashi | 2 |
| #26 | Yoshimasa Morisaki | 2 |
| #27 | Yuusuke Hayashi | 2 |
| #28 | Hiroyuki Hisakuni | 1 |
| #29 | Hiroaki Katayama | 1 |
| #30 | Hisakazu Kojo | 1 |
| #31 | Homare Kudo | 1 |
| #32 | Isao Hashimoto | 1 |
| #33 | Jun Tatebayashi | 1 |
| #34 | Kazuya Yamamoto | 1 |
| #35 | Mikio Aoyama | 1 |
| #36 | Nobuhiro Taniguchi | 1 |
| #37 | Ryoji Utsumi | 1 |
| #38 | Shoji Ehara | 1 |
| #39 | Takaaki Nishioka | 1 |
| #40 | Takanobu Sakai | 1 |
| #41 | Tatsunari Yago | 1 |
| #42 | Tomonori Kosaka | 1 |
| #43 | Yusuke Hayashi | 1 |
| #44 | Kazunori Ohide | 1 |