Top Inventors at Diamond Engineering Co. All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Fumihito Kasagi | 3 |
| 2 | Kazutoshi Teraoka | 3 |
| 3 | Kimihiro Shimono | 3 |
| #4 | Takahiro Takeda | 3 |
| #5 | Katsuhiko Maeda | 1 |
| #6 | Makoto Numazawa | 1 |
| #7 | Matsuo Ohtaka | 1 |
| #8 | Masaaki Okuda | 1 |
| #9 | Minoru Okamoto | 1 |
| #10 | Osamu Shiraishi | 1 |
| #11 | Takushi Tamamura | 1 |
| #12 | Toshinori Yasutomi | 1 |
| #13 | Yasunori Motoi | 1 |
| #14 | Kiyotaka Tomisaki | 1 |