Top Inventors at Ykk Ap All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Koji Matsuda | 3 |
| 2 | Hideoki Tanaka | 2 |
| 3 | Isao Kobayashi | 2 |
| #4 | Kazuhiro Kanayama | 2 |
| #5 | Masaki Nomura | 2 |
| #6 | Naoki Yasuda | 2 |
| #7 | Takashi Hori | 2 |
| #8 | Akio Ozawa | 2 |
| #9 | Daisaku Nakazato | 1 |
| #10 | Hisayuki Kato | 1 |
| #11 | Hiroaki Kubo | 1 |
| #12 | Hiroyuki Sasaki | 1 |
| #13 | Jin Goto | 1 |
| #14 | John Patrick Daniels | 1 |
| #15 | Kazuyuki Fukagawa | 1 |
| #16 | Keiichi Honda | 1 |
| #17 | Masashi SUGAWARA | 1 |
| #18 | Masuo Yamaji | 1 |
| #19 | Mitsuyasu Fukusawa | 1 |
| #20 | Michizumi Ito | 1 |
| #21 | Norikazu Higashitani | 1 |
| #22 | Noboru Maekawa | 1 |
| #23 | Sakae Sato | 1 |
| #24 | Shigekazu Koga | 1 |
| #25 | Shigeyuki Nagai | 1 |
| #26 | Shuhei Ohno | 1 |
| #27 | Toshio Isono | 1 |
| #28 | Toru Kanai | 1 |
| #29 | Toshihiko Saito | 1 |
| #30 | Toshitaka Wakabayashi | 1 |
| #31 | Tsutomu Ito | 1 |
| #32 | Yasuhito Hibi | 1 |
| #33 | Yasushi Yamamoto | 1 |
| #34 | Yoshinori Ishikuro | 1 |
| #35 | Yoshitada Sakamoto | 1 |
| #36 | Yutaka Nakamura | 1 |
| #37 | Akira Ueda | 1 |