1976-12-15
1978-02-07
Gilden, Leon
292435, 72 48, 72DIG1, B21D 1900
Patent
active
040721183
ABSTRACT:
A seam crimping apparatus for crimping standing seams of building panels.
REFERENCES:
patent: 2635332 (1953-04-01), Huntington
patent: 2903988 (1959-09-01), Engel et al.
patent: 3875642 (1975-04-01), Knudson
Armco Steel Corporation
Gilden Leon
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