| Patent Number | Title | Applicant | Opposition Date |
|---|---|---|---|
| EP3196966 | Electrochemical Element, Solid Oxide Type Fuel Battery Cell, And Method For Manufacturing Same | OSAKA GAS CO., LTD. | Jan 29, 2024 |
| EP3432395 | Electrochemical Element, Electrochemical Module, Electrochemical Device, And Energy System | OSAKA GAS CO., LTD. | Jan 5, 2024 |
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