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公开(公告)号：US2233056A
公开(公告)日：1941-02-25
申请号：US27338439
申请日：1939-05-13
Applicant: BELL TELEPHONE LABOR INC
Inventor： LARGE WAYNE V K , SINGER FRED J , CHARLES WHITE
IPC: H04L12/04
CPC classification number: H04L12/04
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公开(公告)号：US2211176A
公开(公告)日：1940-08-13
申请号：US18696338
申请日：1938-01-26
Applicant: BELL TELEPHONE LABOR INC
Inventor： SINGER FRED J
IPC: H04L12/04
CPC classification number: H04L12/04
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公开(公告)号：US2662933A
公开(公告)日：1953-12-15
申请号：US22295451
申请日：1951-04-26
Applicant: BELL TELEPHONE LABOR INC
Inventor： SINGER FRED J
IPC: H04L5/06
CPC classification number: H04L5/06
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公开(公告)号：US2405617A
公开(公告)日：1946-08-13
申请号：US46904542
申请日：1942-12-15
Applicant: BELL TELEPHONE LABOR INC
Inventor： SINGER FRED J
IPC: G09F9/00
CPC classification number: G09F9/00
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公开(公告)号：US2532125A
公开(公告)日：1950-11-28
申请号：US7337349
申请日：1949-01-28
Applicant: BELL TELEPHONE LABOR INC
Inventor： SINGER FRED J , STACY LELAND J
IPC: H04Q5/08
CPC classification number: H04Q5/08
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Patent Agency Ranking
公开(公告)号：US2428389A
公开(公告)日：1947-10-07
申请号：US46968242
申请日：1942-12-21
Applicant: BELL TELEPHONE LABOR INC
Inventor： SINGER FRED J
IPC: G08C19/00
CPC classification number: G08C19/00
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公开(公告)号：US2173335A
公开(公告)日：1939-09-19
申请号：US9336836
申请日：1936-07-30
Applicant: BELL TELEPHONE LABOR INC , AMERICAN TELEPHONE & TELEGRAPH
Inventor： KINKEAD FULLERTON S , SINGER FRED J
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公开(公告)号：US2147720A
公开(公告)日：1939-02-21
申请号：US10333236
申请日：1936-09-30
Applicant: BELL TELEPHONE LABOR INC
Inventor： SINGER FRED J
IPC: H04L12/04
CPC classification number: H04L12/04
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公开(公告)号：US2450516A
公开(公告)日：1948-10-05
申请号：US51782444
申请日：1944-01-11
Applicant: BELL TELEPHONE LABOR INC
Inventor： SMITH KINKEAD RITA , PHELPS WALTER A , SMITH EDWARD M , SINGER FRED J , MELHUISH LAWRENCE E
IPC: G08C19/14
CPC classification number: G08C19/14
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公开(公告)号：US2352271A
公开(公告)日：1944-06-27
申请号：US36883840
申请日：1940-12-06
Applicant: BELL TELEPHONE LABOR INC
Inventor： LANG WILMARTH Y , SINGER FRED J
IPC: H04L12/02
CPC classification number: H04L12/02
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