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Air duct boot
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Patent number 5,542,223
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Issue date Aug 6, 1996
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General Plastics, Inc.
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John P. Inda
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F24 - HEATING RANGES VENTILATING
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Air duct fitting
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Patent number 5,397,155
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Issue date Mar 14, 1995
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General Plastics, Inc.
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John P. Inda
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F24 - HEATING RANGES VENTILATING
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Pipe coupling
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Patent number D348097
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Issue date Jun 21, 1994
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General Plastics, Inc.
-
John P. Inda
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D23 - Environmental heating and cooling
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Pipe fitting
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Patent number D347271
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Issue date May 24, 1994
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General Plastics, Inc.
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John P. Inda
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D23 - Environmental heating and cooling
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Air duct riser
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Patent number D341655
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Issue date Nov 23, 1993
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General Plastics, Inc.
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John P. Inda
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D23 - Environmental heating and cooling
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Double air duct boot
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Patent number 5,240,288
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Issue date Aug 31, 1993
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General Plastics, Inc.
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John P. Inda
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...