Showing 1–19 of 19 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Masaki Mizutani | Canon | 7 |
| 1 | Tomonori Uemura | Ngk Spark Plug Co. | 7 |
| 3 | Seiji Oya | Ngk Spark Plug Co. | 6 |
| #4 | Kuniharu Tanaka | Ngk Spark Plug Co. | 4 |
| #4 | Masaki Nakagawa | Ricoh Company | 4 |
| #6 | Motoyoshi KIMURA | Sumitomo Electric Industries | 3 |
| #7 | Yasuhiko Suzuki | Mitsui Chemicals | 2 |
| #7 | Hideki Miyazaki | Hitachi | 2 |
| #7 | Hiroshi Inagaki | Ngk Spark Plug Co. | 2 |
| #7 | Tatsuhiko MURAOKA | Ngk Spark Plug Co. | 2 |
| #7 | Masayuki Motomura | Ngk Spark Plug Co. | 2 |
| #7 | Tomonari Hatta | Ngk Spark Plug Co. | 2 |
| #13 | Shigetaka Yoshida | Brother Kogyo | 1 |
| #13 | Kazuhiro Maki | Aisin Seiki Kabushiki Kaisha | 1 |
| #13 | Kaname Miwa | Ngk Spark Plug Co. | 1 |
| #13 | Tokifumi Tanaka | Brother Kogyo | 1 |
| #13 | Junki IWABUCHI | Ngk Spark Plug Co. | 1 |
| #13 | Morikuni Kimura | Yamazaki Mazak | 1 |
| #13 | Yasuyuki Ohdaira | Kabushikikaisha Taiheiseisakusho | 1 |