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公开(公告)号:US2250173A
公开(公告)日:1941-07-22
申请号:US29709639
申请日:1939-09-29
Applicant: BELL TELEPHONE LABOR INC
Inventor: ALLISON SEWELL W , MCKIM JAMES B , ROBB THEODORE D
IPC: H04M17/02
CPC classification number: H04M17/023
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2.
公开(公告)号:US2586901A
公开(公告)日:1952-02-26
申请号:US4058448
申请日:1948-07-24
Applicant: BELL TELEPHONE LABOR INC
Inventor: ALLISON SEWELL W
CPC classification number: H04Q3/0016 , H04M3/60
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公开(公告)号:US2027142A
公开(公告)日:1936-01-07
申请号:US70132833
申请日:1933-12-07
Applicant: BELL TELEPHONE LABOR INC
Inventor: ALLISON SEWELL W , MCKIM JAMES B
IPC: H04Q1/442
CPC classification number: H04Q1/4423
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公开(公告)号:US1853022A
公开(公告)日:1932-04-12
申请号:US48715430
申请日:1930-10-08
Applicant: BELL TELEPHONE LABOR INC
Inventor: ALLISON SEWELL W , MCCULLAGH WILLIS I
IPC: H04M3/32
CPC classification number: H04M3/323
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公开(公告)号:US2868886A
公开(公告)日:1959-01-13
申请号:US47268954
申请日:1954-12-02
Applicant: BELL TELEPHONE LABOR INC
Inventor: ALLISON SEWELL W
IPC: H04M3/60
CPC classification number: H04M3/60
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公开(公告)号:US2115133A
公开(公告)日:1938-04-26
申请号:US3851235
申请日:1935-08-30
Applicant: BELL TELEPHONE LABOR INC
Inventor: ALLISON SEWELL W
IPC: H04M5/06
CPC classification number: H04M5/06
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