Assignee
- Nippon Steel Engineering Co.
- Japan Oil, Gas And Metals National
- Sekiyushigen Kaihatsu Kabushiki Kaisha
- Cosmo Oil Co.
- Inpex
Inventors
- Yasuhiro Onishi (28 patents)
- Kenichiro Fujimoto (18 patents)
- Masaru Ihara (14 patents)
- Yoshifumi Suehiro (3 patents)
- Yasumasa Morita (10 patents)
- Kiyoshi Inaba (5 patents)
- Toshio Shimizu (68 patents)
- Osamu Iwamoto (27 patents)