Manufacture of paper, paperboard, building boards, roofing and flooring sheets and cloths, and the like
United States Patent 1675244

Inventors:
Frederick, Blombery George
Publication Date:
06/26/1928
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Assignee:
Frederick, Blombery George
Primary Class:
162/170
Other Classes:
162/176, 162/99, 524/55, 162/151, 162/148, 524/928, 162/150
International Classes:
D21H17/30; D21H17/00