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公开(公告)号:US3350509A
公开(公告)日:1967-10-31
申请号:US41739064
申请日:1964-12-10
Applicant: BELL TELEPHONE LABOR INC
Inventor: LEE ROBERT C , SOFFEL ROBERT O , VIGLIANTE FRANK S
IPC: H04Q11/04
CPC classification number: H04Q11/0407
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公开(公告)号:US3027550A
公开(公告)日:1962-03-27
申请号:US63153156
申请日:1956-12-31
Applicant: BELL TELEPHONE LABOR INC
Inventor: LEE ROBERT C , YOSTPILLE JOHN J
IPC: H04Q3/42
CPC classification number: H04Q3/42
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3.Magnetic drum auxiliary sender for telephone switching system 失效
Title translation: 用于电话交换系统的磁鼓辅助发送器公开(公告)号:US2876288A
公开(公告)日:1959-03-03
申请号:US55428055
申请日:1955-12-20
Applicant: BELL TELEPHONE LABOR INC
Inventor: BROOKS CHESTER E , FLECKENSTEIN WILLIAM O , LEE ROBERT C , SECKLER HOWARD N
IPC: H04Q3/00
CPC classification number: H04Q3/0004
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