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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Feutz; Roger A.
Address:
Grand Rapids, MI
No. of patents:
1
Patents:




Patent Number Title Of Patent Date Issued
4288111 Joint construction for sheet metal ducts September 8, 1981
A first section of cylindrical sheet metal duct has a end roll-formed to define an outwardly formed flange, a central cylindrical flange whose axis is parallel to the cylindrical wall of the duct and which is radially outwardly offset from the cylindrical wall, and an inwardly formed end


 
 
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