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公开(公告)号：US2342947A
公开(公告)日：1944-02-29
申请号：US43356842
申请日：1942-03-06
Applicant: TRIPLETT ELECTRICAL INSTR COMP
Inventor： LINGEL FREDERICK J
IPC: G01R27/12
CPC classification number: G01R27/12
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2.发明授权Exposure meter having adjustable interconnected photocell shutter and pointer biasing means 失效曝光计具有可调节的互连光电池快门和指针偏置装置
公开(公告)号：US2482281A
公开(公告)日：1949-09-20
申请号：US77933047
申请日：1947-10-11
Applicant: TRIPLETT ELECTRICAL INSTR COMP
Inventor： LINGEL FREDERICK J
IPC: G01J1/42
CPC classification number: G01J1/4214
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公开(公告)号：US2450973A
公开(公告)日：1948-10-12
申请号：US59083945
申请日：1945-04-28
Applicant: TRIPLETT ELECTRICAL INSTR COMP
Inventor： LINGEL FREDERICK J
IPC: H01F38/30
CPC classification number: H01F38/30
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