Michael T. Kopczewski

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Orient, OH, US

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Patents Grantslast 30 patents

Information Patent Grant
Electric space heater for mounting on a ceiling or wall
- Patent number D379650
- Issue date Jun 3, 1997
- The W. B. Marvin Manufacturing Co.
- Barry W. Smith
- D23 - Environmental heating and cooling
Information Patent Grant
Radiant electric space heater with angular adjustment support bracket
- Patent number 5,621,846
- Issue date Apr 15, 1997
- The W. B. Marvin Manufacturing Company
- Barry W. Smith
- F24 - HEATING RANGES VENTILATING