Top Inventors at Howa Plastics Co. All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Hideki Kajio | 5 |
| 2 | Hidekazu Makimura | 3 |
| 3 | Hiroyuki Oe | 2 |
| #4 | Kazuhiro Kawamura | 2 |
| #5 | Shouji Kawakami | 2 |
| #6 | Yosuke MATSUZAWA | 2 |
| #7 | Atsushi Yamaguchi | 1 |
| #8 | Daisuke Kogiso | 1 |
| #9 | Hiroki Takada | 1 |
| #10 | Kazuya Kato | 1 |
| #11 | Kazuo Kondo | 1 |
| #12 | Katsuaki Okuno | 1 |
| #13 | Keisuke Sakakibara | 1 |
| #14 | Keiko Tanaka | 1 |
| #15 | Koji Sawada | 1 |
| #16 | Masahiro Endou | 1 |
| #17 | Masayuki Komatsu | 1 |
| #18 | Masaaki Yamamoto | 1 |
| #19 | Michio Ono | 1 |
| #20 | Naoyuki Takahashi | 1 |
| #21 | Ryo Nagahashi | 1 |
| #22 | Shota UCHIYAMA | 1 |
| #23 | Takamitsu Murohashi | 1 |
| #24 | Takahiro Sugiyama | 1 |
| #25 | Yoko Ishiguro | 1 |
| #26 | Yoshiyuki Sakuma | 1 |