Title:
Mechanism for corrugating and indenting plastic sheet material
United States Patent 1444395
Inventors:
Seigle, William R.
Publication Date:
02/06/1923
Export Citation:
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Assignee:
Seigle, William R.
Primary Class:
425/396
International Classes:
B31F1/28; F16L59/08; B31F1/20; F16L59/08
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