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21.Recorder system with electromagnetically attracted electric stylus 失效
Title translation: 录音系统采用电磁吸引电针公开(公告)号:US2433382A
公开(公告)日:1947-12-30
申请号:US55361344
申请日:1944-09-11
Applicant: BELL TELEPHONE LABOR INC
Inventor: MARRISON WARREN A
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公开(公告)号:US1970329A
公开(公告)日:1934-08-14
申请号:US55960631
申请日:1931-08-27
Applicant: BELL TELEPHONE LABOR INC
Inventor: MARRISON WARREN A
IPC: H02J7/34
CPC classification number: H02J7/34 , Y10T307/625
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公开(公告)号:US1936683A
公开(公告)日:1933-11-28
申请号:US56113531
申请日:1931-09-04
Applicant: BELL TELEPHONE LABOR INC
Inventor: MARRISON WARREN A
IPC: G01R23/02
CPC classification number: G01R23/02
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公开(公告)号:US1899163A
公开(公告)日:1933-02-28
申请号:US49266830
申请日:1930-11-01
Applicant: BELL TELEPHONE LABOR INC
Inventor: MARRISON WARREN A
IPC: H03H9/19
CPC classification number: H03H9/19
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公开(公告)号:US1860935A
公开(公告)日:1932-05-31
申请号:US25678428
申请日:1928-02-24
Applicant: BELL TELEPHONE LABOR INC
Inventor: MARRISON WARREN A , HORTON JOSEPH W
IPC: H04N5/04
CPC classification number: H04N5/04
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公开(公告)号:US1762725A
公开(公告)日:1930-06-10
申请号:US26443128
申请日:1928-03-24
Applicant: BELL TELEPHONE LABOR INC
Inventor: MARRISON WARREN A
IPC: G01R23/02
CPC classification number: G01R23/02
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公开(公告)号:US1746788A
公开(公告)日:1930-02-11
申请号:US32766028
申请日:1928-12-21
Applicant: BELL TELEPHONE LABOR INC
Inventor: MARRISON WARREN A
IPC: H03H9/17
CPC classification number: H03H9/17
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公开(公告)号:US2836033A
公开(公告)日:1958-05-27
申请号:US36818553
申请日:1953-07-15
Applicant: BELL TELEPHONE LABOR INC
Inventor: MARRISON WARREN A
CPC classification number: G08B17/04 , F02G2243/52 , F03G7/002 , F25B9/145 , F25B2309/1403 , F25B2309/1407 , H02N11/002 , Y10S116/22
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29.Selective signaling generator in which coded information is recorded on a magnetizable medium 失效
Title translation: 编码信息被记录在可磁化介质上的选择性信令发生器公开(公告)号:US2558187A
公开(公告)日:1951-06-26
申请号:US13319149
申请日:1949-12-15
Applicant: BELL TELEPHONE LABOR INC
Inventor: MARRISON WARREN A
IPC: H04M1/276
CPC classification number: H04M1/276
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公开(公告)号:US2442702A
公开(公告)日:1948-06-01
申请号:US61763345
申请日:1945-09-20
Applicant: BELL TELEPHONE LABOR INC
Inventor: MARRISON WARREN A
IPC: H04Q3/42
CPC classification number: H04Q3/42
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