4. Batteries: thermoelectric and photoelectric
  5. Photoelectric
  6. Cells

R & D Technologies, Inc.

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High efficiency pool heating system

Refrigeration – Disparate apparatus utilized as heat source or absorber – With power vapor generator
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High efficiency pool heating system and power unit

Motors: expansible chamber type – With motive fluid valve – Electrically operated
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Thermophotovoltaic systems

Batteries: thermoelectric and photoelectric – Photoelectric – Cells
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