John W. Slavik

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Warren, OH, US

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Patents Grantslast 30 patents

Information Patent Grant
Fireplace closures
- Patent number 4,303,056
- Issue date Dec 1, 1981
- John W. Slavik
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Fireplace enclosure with heat exchanger
- Patent number 4,112,915
- Issue date Sep 12, 1978
- John W. Slavik
- F24 - HEATING RANGES VENTILATING