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公开(公告)号:US1673015A
公开(公告)日:1928-06-12
申请号:US17984527
申请日:1927-03-31
Applicant: BELL TELEPHONE LABOR INC
Inventor: MURPHY PAUL B
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公开(公告)号:US2998596A
公开(公告)日:1961-08-29
申请号:US70091157
申请日:1957-12-05
Applicant: BELL TELEPHONE LABOR INC
Inventor: MURPHY PAUL B
IPC: G09G3/04
CPC classification number: G09G3/045
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公开(公告)号:US2633502A
公开(公告)日:1953-03-31
申请号:US8975749
申请日:1949-04-26
Applicant: BELL TELEPHONE LABOR INC
Inventor: CARPENTER WARREN W , MURPHY PAUL B
IPC: H01H63/38
CPC classification number: H01H63/38
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14.Method of recording information on stationary magnetic material 失效
Title translation: 在固定磁性材料上记录信息的方法公开(公告)号:US2511121A
公开(公告)日:1950-06-13
申请号:US848548
申请日:1948-02-14
Applicant: BELL TELEPHONE LABOR INC
Inventor: MURPHY PAUL B
IPC: H04L13/08
CPC classification number: H04L13/08 , Y10S101/37
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公开(公告)号:US1695057A
公开(公告)日:1928-12-11
申请号:US19525127
申请日:1927-05-31
Applicant: BELL TELEPHONE LABOR INC
Inventor: MURPHY PAUL B
IPC: H04Q3/00
CPC classification number: H04Q3/0016
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