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公开(公告)号：US1871410A
公开(公告)日：1932-08-09
申请号：US37929929
申请日：1929-07-18
Applicant: GEN ELECTRIC
Inventor： HARDY CLYDE V , JOHNSTON PHILIP J
IPC: G01L21/04
CPC classification number: G01L21/04
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公开(公告)号：US1294305A
公开(公告)日：1919-02-11
申请号：US1914861904
申请日：1914-09-15
Applicant: GEN ELECTRIC
Inventor： ROBINSON LEWIS T , HARDY CLYDE V
CPC classification number: H02H3/093
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