Top Inventors at M. Watanabe & Co. All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Koji Yamanaka | 4 |
| 2 | Nobuyuki Yoshioka | 4 |
| 3 | Yoshikazu Nagamura | 4 |
| #4 | Hozumi Usui | 3 |
| #5 | Masaki Kusuhara | 2 |
| #6 | Masaru Nakamura | 2 |
| #7 | Hiroshi Morita | 1 |
| #8 | Hirofumi Uehara | 1 |
| #9 | Hiroyuki Watanabe | 1 |
| #10 | Jinichi Omi | 1 |
| #11 | Keiko Sanpei | 1 |
| #12 | Kunio Sugiyama | 1 |
| #13 | Masao Kikuchi | 1 |
| #14 | Masao Ninomiya | 1 |
| #15 | Masaru Umeda | 1 |
| #16 | Shuichi TADA | 1 |
| #17 | Tadahiro Nakada | 1 |
| #18 | Motojuro Yamaya | 1 |