Robert Z. Schreffler

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Chester, VA, US

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Patents Grantslast 30 patents

Information Patent Grant
Residential fireplace insert
- Patent number 7,509,954
- Issue date Mar 31, 2009
- Robert Z. Schreffler
- F24 - HEATING RANGES VENTILATING

Patents Applicationslast 30 patents

Information Patent Application
Enigma Panel
- Publication number 20150267920
- Publication date Sep 24, 2015
- Robert Zerby Schreffler
- F24 - HEATING RANGES VENTILATING
Information Patent Application
Residential fireplace insert system improvements
- Publication number 20090205634
- Publication date Aug 20, 2009
- Robert Zerby Schreffler
- F24 - HEATING RANGES VENTILATING
Information Patent Application
Residential fireplace insert
- Publication number 20080041361
- Publication date Feb 21, 2008
- Robert Z. Schreffler
- F24 - HEATING RANGES VENTILATING