Keith M. Grahl

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Fort Smith, AR, US

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Patents Grantslast 30 patents

Information Patent Grant
Low NO.sub.x combustion system for fuel-fired heating appliances
- Patent number 5,649,529
- Issue date Jul 22, 1997
- Rheem Manufacturing Company
- Lin-Tao Lu
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Low NO.sub.x combustion system for fuel-fired heating appliances
- Patent number 5,370,529
- Issue date Dec 6, 1994
- Rheem Manufacturing Company
- Lin-Tao Lu
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
NO.sub.X reducing device for fuel-fired heating appliances
- Patent number 5,146,910
- Issue date Sep 15, 1992
- Rheem Manufacturing Company
- Keith M. Grahl
- F28 - HEAT EXCHANGE IN GENERAL