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公开(公告)号：US2376131A
公开(公告)日：1945-05-15
申请号：US45978242
申请日：1942-09-26
Applicant: BELL TELEPHONE LABOR INC
Inventor： DUNLAP KERMIT S , KELSALL GEORGE A , LOVELL CIARENCE A , MALLINA RUDOLPH F
IPC: H04M1/23
CPC classification number: H04M1/23
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