4. Power plants
  5. Motor operated by expansion and/or contraction of a unit of...
  6. Mass is a solid

John S. Cory

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Automatic ribbon re-inker

Typewriting machines – Including interposed inking device for record-medium – Renovation of used ribbon
Patent

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Solid state heat engine

Power plants – Motor operated by expansion and/or contraction of a unit of... – Mass is a solid
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Variable density heat engine

Power plants – Motor operated by expansion and/or contraction of a unit of... – Mass is a solid
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Profile ID: LFUS-PAI-P-1327599

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