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公开(公告)号：US2220671A
公开(公告)日：1940-11-05
申请号：US16938937
申请日：1937-10-16
Applicant: CURTIS PUBLISHING COMPANY
Inventor： BLAETZ HARRY M
IPC: B41C3/08
CPC classification number: B41C3/08
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公开(公告)号：US2129904A
公开(公告)日：1938-09-13
申请号：US17992737
申请日：1937-12-15
Applicant: CURTIS PUBLISHING COMPANY
Inventor： BLAETZ HARRY M
IPC: C21D9/00
CPC classification number: C21D9/005
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