4. Chemistry: electrical current producing apparatus, product, and
  5. Current producing cell, elements, subcombinations and...

Helion

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Light bipolar plate for fuel cell and method for making same

Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and...
Reexamination Certificate

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Power supply plate for a coplanar circuit fuel cell

Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation
Reexamination Certificate

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