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Solar heat system
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Patent number 4,269,229
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Issue date May 26, 1981
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Richdel, Inc.
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Myrl J. Saarem
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F24 - HEATING RANGES VENTILATING
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Solar heat system
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Patent number 4,191,166
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Issue date Mar 4, 1980
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Richdel, Inc.
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Myrl J. Saarem
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F24 - HEATING RANGES VENTILATING
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Pilot operated diaphragm valve
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Patent number 4,135,696
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Issue date Jan 23, 1979
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Richdel, Inc.
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Myrl J. Saarem
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...