John D. Polkinghorne

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Burlington, Ontario, CA

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Patents Grantslast 30 patents

Information Patent Grant
Compact thermoelectric refrigeration drive assembly
- Patent number 5,809,785
- Issue date Sep 22, 1998
- John D. Polkinghorne
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Compact thermoelectric refrigeration drive assembly
- Patent number 5,784,890
- Issue date Jul 28, 1998
- John D. Polkinghorne
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...