Title:
METHOD OF MAKING A FORAMINOUS DRAINAGE MEMBER
United States Patent 3549742
Inventors:
Benz, Charles S.
Publication Date:
12/22/1970
Other Classes:
162/900, 162/116, 139/425R, 162/348, 139/425A, 264/317
International Classes:
D21F11/00; D21J7/00; B29D29/00