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公开(公告)号：US2509602A
公开(公告)日：1950-05-30
申请号：US70813346
申请日：1946-11-06
Applicant: BLACK ROCK MFG COMPANY
Inventor： MAQUAT LLOYD E
CPC classification number: B26D3/003 , B31C1/00 , Y10T83/2211 , Y10T83/50 , Y10T83/7613
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公开(公告)号：US2437109A
公开(公告)日：1948-03-02
申请号：US38045241
申请日：1941-02-25
Applicant: BLACK ROCK MFG COMPANY
Inventor： MAQUAT LLOYD E
IPC: B29C41/14
CPC classification number: B29C41/14 , B29K2021/00
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