1582581-A is referenced by 5 patents.

Title
No title available
Application Number
FRD1582581 19680730
Publication Number
1582581 (A)
Application Date
July 30, 1968
Publication Date
October 3, 1969
IPC
E04C2/32
E04C 02/32
E04C2/32
E04C 02/32
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