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公开(公告)号：US1992066A
公开(公告)日：1935-02-19
申请号：US69015133
申请日：1933-09-19
Applicant: AMERICAN INSTR COMPANY
Inventor： MCKAY GREER DAVID
IPC: H01H29/30
CPC classification number: H01H29/30
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公开(公告)号：US1945434A
公开(公告)日：1934-01-30
申请号：US66384333
申请日：1933-03-31
Applicant: AMERICAN INSTR COMPANY
Inventor： MCKAY GREER DAVID
IPC: G01K5/16
CPC classification number: G01K5/16
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