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公开(公告)号:US2010529A
公开(公告)日:1935-08-06
申请号:US51762431
申请日:1931-02-21
Applicant: RCA CORP
Inventor: URK AREND THOMAS VAN
IPC: H04R9/04
CPC classification number: H04R9/04
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公开(公告)号:US2020814A
公开(公告)日:1935-11-12
申请号:US42331630
申请日:1930-01-25
Applicant: RCA CORP
Inventor: URK AREND THOMAS VAN , GERRIT PEUSKEN
IPC: H04R9/04
CPC classification number: H04R9/046
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公开(公告)号:US1961180A
公开(公告)日:1934-06-05
申请号:US48144830
申请日:1930-09-12
Applicant: RCA CORP
Inventor: URK AREND THOMAS VAN
IPC: H04R11/00
CPC classification number: H04R11/00
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4.Device for converting electric oscillations into mechanical vibrations 失效
Title translation: 将电振荡转换为机械振动的装置公开(公告)号:US1781795A
公开(公告)日:1930-11-18
申请号:US19243027
申请日:1927-05-18
Applicant: RCA CORP
Inventor: ROELOF VERMEULEN , URK AREND THOMAS VAN , HENDRICUS HERMANS THEODORUS
IPC: H04R11/00
CPC classification number: H04R11/00
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5.Electrodynamic magnet system for microphones, loudspeakers, or similar devices 失效
Title translation: 用于麦克风,扬声器或类似设备的电动磁体系统公开(公告)号:US2006847A
公开(公告)日:1935-07-02
申请号:US25944528
申请日:1928-03-06
Applicant: RCA CORP
Inventor: ROELOF VERMEULEN , URK AREND THOMAS VAN
IPC: H04R9/04
CPC classification number: H04R9/045
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6.Diaphragm or diaphragm mount for loudspeakers or other sound reproducing devices 失效
Title translation: 用于扬声器或其他声音再现装置的隔膜或隔膜安装公开(公告)号:US1877804A
公开(公告)日:1932-09-20
申请号:US20593627
申请日:1927-07-15
Applicant: RCA CORP
Inventor: JOHANNES BRUIJNES , URK AREND THOMAS VAN
IPC: H04R7/20
CPC classification number: H04R7/20
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7.Device for converting electric oscillations into mechanical vibrations 失效
Title translation: 将电振荡转换为机械振动的装置公开(公告)号:US1820943A
公开(公告)日:1931-09-01
申请号:US24057127
申请日:1927-12-16
Applicant: RCA CORP
Inventor: GILLES HOLST , URK AREND THOMAS VAN , ROELOF VERMEULEN
IPC: H04R11/00
CPC classification number: H04R11/00
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8.Magnet system for converting electrical into mechanical energy or inversely 失效
Title translation: 用于将电气转换为机械能或反向的磁体系统公开(公告)号:US1817787A
公开(公告)日:1931-08-04
申请号:US40416929
申请日:1929-11-01
Applicant: RCA CORP
Inventor: ROELOF VERMEULEN , URK AREND THOMAS VAN
IPC: H04R11/00
CPC classification number: H04R11/00
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