Assignee
- Japan Oil, Gas And Metals National
- Japan Petroleum Exploration Co.
- Cosmo Oil Co.
- Nippon Steel Engineering Co.
- Inpex
Inventors
- Hiroaki Hara (23 patents)
- Toshio Shimizu (68 patents)
- Yutaka Miyata (21 patents)
US Patent 8158841 · Granted Apr 17, 2012