Top Inventors at Placo Co All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Douglas Thai | 5 |
| 2 | Kaoru Shimomura | 2 |
| 3 | Masanori Kikuchi | 2 |
| #4 | Takashi Imai | 2 |
| #5 | Takuya Shimokawa | 2 |
| #6 | Darren Neuman | 1 |
| #7 | Kazutosi Nagahori | 1 |
| #8 | Kazuaki Sakakura | 1 |
| #9 | Minoru Takahashi | 1 |
| #10 | Shigeharu Tanaka | 1 |
| #11 | Tadao Adachi | 1 |
| #12 | Takumi Fujisaki | 1 |
| #13 | Toshiro Ozaki | 1 |
| #14 | Akira Ohta | 1 |