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公开(公告)号:US2744162A
公开(公告)日:1956-05-01
申请号:US16807250
申请日:1950-06-14
Applicant: INT STANDARD ELECTRIC CORP
Inventor: DEN HERTOG MARTINUS , DE ZEEUW CONSTANTINUS
IPC: H04Q3/00
CPC classification number: H04Q3/0004
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2.
公开(公告)号:US2664467A
公开(公告)日:1953-12-29
申请号:US17134150
申请日:1950-06-30
Applicant: INT STANDARD ELECTRIC CORP
Inventor: DEN HERTOG MARTINUS
IPC: H04Q3/00
CPC classification number: H04Q3/0004
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公开(公告)号:US2610255A
公开(公告)日:1952-09-09
申请号:US73113647
申请日:1947-02-26
Applicant: INT STANDARD ELECTRIC CORP
Inventor: DEN HERTOG MARTINUS , JAKOB KRUITHOF
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公开(公告)号:US2595378A
公开(公告)日:1952-05-06
申请号:US16767450
申请日:1950-06-12
Applicant: INT STANDARD ELECTRIC CORP
Inventor: DEN HERTOG MARTINUS , HELMUT ADELAAR HANS
CPC classification number: H04Q3/00 , H04Q1/18 , Y10T307/858
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公开(公告)号:US2452578A
公开(公告)日:1948-11-02
申请号:US47327843
申请日:1943-01-22
Applicant: INT STANDARD ELECTRIC CORP
Inventor: JACOB KRUITHOF , DEN HERTOG MARTINUS
IPC: H04Q1/18
CPC classification number: H04Q1/18
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6.Telecommunication system employing voice frequency current for selective signaling 失效
Title translation: 电话系统采用语音电流进行选择性信令公开(公告)号:US2423084A
公开(公告)日:1947-07-01
申请号:US48627443
申请日:1943-05-08
Applicant: INT STANDARD ELECTRIC CORP
Inventor: DEN HERTOG MARTINUS , WRIGHT ESMOND P G
CPC classification number: H04Q1/444 , H04Q3/0016
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公开(公告)号:US2862060A
公开(公告)日:1958-11-25
申请号:US43095954
申请日:1954-05-19
Applicant: INT STANDARD ELECTRIC CORP
Inventor: ANDRE DUCAMP , DEN HERTOG MARTINUS
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公开(公告)号:US2706748A
公开(公告)日:1955-04-19
申请号:US18893250
申请日:1950-10-07
Applicant: INT STANDARD ELECTRIC CORP
Inventor: DEN HERTOG MARTINUS
IPC: H04Q3/00
CPC classification number: H04Q3/0004
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公开(公告)号:US2694751A
公开(公告)日:1954-11-16
申请号:US17570450
申请日:1950-07-25
Applicant: INT STANDARD ELECTRIC CORP
Inventor: DEN HERTOG MARTINUS , DE ZEEUW CONSTANTINUS
IPC: H04Q3/42
CPC classification number: H04Q3/42
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10.Identification circuit for automatic or semiautomatic telephone systems 失效
Title translation: 自动或半自动电话系统的识别电路公开(公告)号:US2686840A
公开(公告)日:1954-08-17
申请号:US19762350
申请日:1950-11-25
Applicant: INT STANDARD ELECTRIC CORP
Inventor: DEN HERTOG MARTINUS
IPC: H04M15/08
CPC classification number: H04M15/08
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