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公开(公告)号：US2506335A
公开(公告)日：1950-05-02
申请号：US66332046
申请日：1946-04-19
Applicant: GEN ELECTRIC
Inventor： BIAS FRANK J , LORD HOAROLD W
IPC: G01R13/32
CPC classification number: G01R13/32
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公开(公告)号：US2449801A
公开(公告)日：1948-09-21
申请号：US56392044
申请日：1944-11-17
Applicant: GEN ELECTRIC
Inventor： BIAS FRANK J , LORD HAROLD W
IPC: G01R13/32
CPC classification number: G01R13/32
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公开(公告)号：US2457522A
公开(公告)日：1948-12-28
申请号：US66331946
申请日：1946-04-19
Applicant: GEN ELECTRIC
Inventor： BIAS FRANK J , LORD HAROLD W
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