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公开(公告)号:US2327481A
公开(公告)日:1943-08-24
申请号:US45186242
申请日:1942-07-22
Applicant: BELL TELEPHONE LABOR INC
Inventor: ABBOTT HENRY H
IPC: H04M3/62
CPC classification number: H04M3/62
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公开(公告)号:US2289895A
公开(公告)日:1942-07-14
申请号:US38583441
申请日:1941-03-29
Applicant: BELL TELEPHONE LABOR INC
Inventor: ABBOTT HENRY H
IPC: H04Q3/62
CPC classification number: H04Q3/625
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23.Communication system line circuit particularly for key telephone systems 失效
Title translation: 通信系统线路电路特别适用于主要电话系统公开(公告)号:US3420963A
公开(公告)日:1969-01-07
申请号:US3420963D
申请日:1965-07-30
Applicant: BELL TELEPHONE LABOR INC
Inventor: ABBOTT HENRY H , HOHMANN LAWRENCE A JR , WELLS GEORGE W
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公开(公告)号:US3377432A
公开(公告)日:1968-04-09
申请号:US38658964
申请日:1964-07-31
Applicant: BELL TELEPHONE LABOR INC
Inventor: ABBOTT HENRY H , FETTE CHARLES J , MEISE JR HENRY A
IPC: H04Q3/54
CPC classification number: H04Q3/54
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公开(公告)号:US3059058A
公开(公告)日:1962-10-16
申请号:US7814760
申请日:1960-12-23
Applicant: BELL TELEPHONE LABOR INC
Inventor: ABBOTT HENRY H
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公开(公告)号:US3037087A
公开(公告)日:1962-05-29
申请号:US4659560
申请日:1960-08-01
Applicant: BELL TELEPHONE LABOR INC
Inventor: ABBOTT HENRY H , MARTIN CHARLES R , OLSEN ORVING C , PREVITE RICHARD A , WALSH HENRY J , WALSH JOHN G
IPC: H04M9/00
CPC classification number: H04M9/00
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公开(公告)号:US2794859A
公开(公告)日:1957-06-04
申请号:US43966654
申请日:1954-06-28
Applicant: BELL TELEPHONE LABOR INC
Inventor: ABBOTT HENRY H , WELCH PAUL V
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公开(公告)号:US2314187A
公开(公告)日:1943-03-16
申请号:US36219640
申请日:1940-10-22
Applicant: BELL TELEPHONE LABOR INC
Inventor: ABBOTT HENRY H
IPC: H04Q3/42
CPC classification number: H04Q3/42
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公开(公告)号:US2270915A
公开(公告)日:1942-01-27
申请号:US36137640
申请日:1940-10-16
Applicant: BELL TELEPHONE LABOR INC
Inventor: ABBOTT HENRY H , BOWNE LANGFORD J , ALBERT TRADUP
IPC: H04M3/56
CPC classification number: H04M3/56
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