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公开(公告)号:US2309081A
公开(公告)日:1943-01-26
申请号:US41318641
申请日:1941-10-01
Applicant: BELL TELEPHONE LABOR INC
Inventor: PRIESSMAN NEIL Y , JOHN WHYTOCK
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公开(公告)号:US2306513A
公开(公告)日:1942-12-29
申请号:US38920841
申请日:1941-04-18
Applicant: BELL TELEPHONE LABOR INC
Inventor: JOHN WHYTOCK
IPC: H01C13/02
CPC classification number: H01C13/02
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