Petroleum Energy Center and Showa Shell Sekiyu Kabushiki Kaisha
Patent Applications and Registrations
Patent applications and USPTO patent grants for Petroleum Energy Center and Showa Shell Sekiyu Kabushiki Kaisha.The latest application filed is for "fuel cell electricity generation process".
- Petroleum Energy Center and Showa Shell Sekiyu Kabushiki Kaisha - Tokyo JP
| Patent | Date |
|---|---|
| Fuel cell electricity generation process Grant 5,149,600 - Yamase , et al. September 22, 1 | 1992-09-22 |
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