Air duct boot

Details Air duct boot Air duct boot

1999-03-22

2000-04-25

Siegel, Mitchell

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Element or attachment, not elsewhere specified

2399

Patent

active

D04236602

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Exhibit A--Photograph of prior air duct riser.
Exhibit B--Photograph of prior art duct riser.
Sales information from Northern Pipe Products and GPK Products, Inc. (Undated but believed to be prior art to the present application).

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