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公开(公告)号:US2854511A
公开(公告)日:1958-09-30
申请号:US43062054
申请日:1954-05-18
Applicant: RCA CORP
Inventor: OLSON HARRY F
IPC: H04R3/00
CPC classification number: H04R3/005
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公开(公告)号:US2838607A
公开(公告)日:1958-06-10
申请号:US22338851
申请日:1951-04-27
Applicant: RCA CORP
Inventor: OLSON HARRY F , JOHN PRESTON
IPC: H04R1/02
CPC classification number: H04R1/021
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公开(公告)号:US2645684A
公开(公告)日:1953-07-14
申请号:US3619748
申请日:1948-06-30
Applicant: RCA CORP
Inventor: OLSON HARRY F , JOHN PRESTON
IPC: H04R9/12
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公开(公告)号:US2640110A
公开(公告)日:1953-05-26
申请号:US12446149
申请日:1949-10-29
Applicant: RCA CORP
Inventor: OLSON HARRY F , JOHN PRESTON
IPC: H04R1/40
CPC classification number: H04R1/406
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公开(公告)号:US2502020A
公开(公告)日:1950-03-28
申请号:US57477245
申请日:1945-01-26
Applicant: RCA CORP
Inventor: OLSON HARRY F
IPC: G10K11/16
CPC classification number: G10K11/16
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6.Diffraction type sound absorber with complementary fitting portions 失效
Title translation: 具有互补配合部分的衍射型吸声器公开(公告)号:US2502019A
公开(公告)日:1950-03-28
申请号:US57477145
申请日:1945-01-26
Applicant: RCA CORP
Inventor: OLSON HARRY F
IPC: G10K11/16
CPC classification number: G10K11/16
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公开(公告)号:US2461344A
公开(公告)日:1949-02-08
申请号:US57500845
申请日:1945-01-29
Applicant: RCA CORP
Inventor: OLSON HARRY F
CPC classification number: H04B11/00 , H04R1/1016 , H04R1/1025 , H04R2420/07
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公开(公告)号:US2293166A
公开(公告)日:1942-08-18
申请号:US25389439
申请日:1939-01-31
Applicant: RCA CORP
Inventor: OLSON HARRY F
IPC: H03J5/14
CPC classification number: H03J5/14
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公开(公告)号:US2247731A
公开(公告)日:1941-07-01
申请号:US34863240
申请日:1940-07-31
Applicant: RCA CORP
Inventor: OLSON HARRY F
IPC: G11B33/02
CPC classification number: G11B33/02
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