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公开(公告)号：US1721905A
公开(公告)日：1929-07-23
申请号：US13436126
申请日：1926-09-09
Applicant: BLACK ROCK MFG COMPANY
Inventor： HAMMOND GUY L , MESSINGER JR LESTER HUBERT
IPC: B26D3/16
CPC classification number: B26D3/162 , Y10T82/16591 , Y10T82/16771 , Y10T82/16951
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公开(公告)号：US1685127A
公开(公告)日：1928-09-25
申请号：US17950227
申请日：1927-03-30
Applicant: BLACK ROCK MFG COMPANY
Inventor： HAMMOND GUY L , MESSINGER JR LESTER H , WILLIAM NICHOLAS
IPC: B26D3/16
CPC classification number: B26D3/16 , Y10T82/16591 , Y10T82/16704 , Y10T82/16754 , Y10T82/16967 , Y10T82/2564
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公开(公告)号：US1592933A
公开(公告)日：1926-07-20
申请号：US62520423
申请日：1923-03-15
Applicant: BLACK ROCK MFG COMPANY
Inventor： HAMMOND GUY L , WILLIAM NICHOLAS
IPC: B26D3/16
CPC classification number: B26D3/16 , Y10T82/16622 , Y10T82/16819 , Y10T82/16951 , Y10T83/242
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