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公开(公告)号:US2642948A
公开(公告)日:1953-06-23
申请号:US2984548
申请日:1948-05-28
Applicant: RCA CORP
Inventor: OLSON HARRY F , JOHN PRESTON
IPC: H04R1/28
CPC classification number: H04R1/2819 , H04R1/2865
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公开(公告)号:US2566094A
公开(公告)日:1951-08-28
申请号:US16957450
申请日:1950-06-22
Applicant: RCA CORP
Inventor: OLSON HARRY F , JOHN PRESTON
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公开(公告)号:US3073411A
公开(公告)日:1963-01-15
申请号:US84962759
申请日:1959-10-29
Applicant: RCA CORP
Inventor: BLEAZEY JOHN C , JOHN PRESTON
IPC: H04R7/14
CPC classification number: H04R7/14
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公开(公告)号:US2870856A
公开(公告)日:1959-01-27
申请号:US35675553
申请日:1953-05-22
Applicant: RCA CORP
Inventor: OLSON HARRY F , JOHN PRESTON
IPC: H04R1/38
CPC classification number: H04R1/38
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公开(公告)号:US2858375A
公开(公告)日:1958-10-28
申请号:US53974455
申请日:1955-10-11
Applicant: RCA CORP
Inventor: OLSON HARRY F , JOHN PRESTON
IPC: H04R9/12
CPC classification number: H04R9/12
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公开(公告)号:US2680787A
公开(公告)日:1954-06-08
申请号:US25913851
申请日:1951-11-30
Applicant: RCA CORP
Inventor: OLSON HARRY F , JOHN PRESTON , BLEAZEY JOHN C
IPC: H04R1/38
CPC classification number: H04R1/38
-
公开(公告)号:US2628289A
公开(公告)日:1953-02-10
申请号:US12446249
申请日:1949-10-29
Applicant: RCA CORP
Inventor: OLSON HARRY F , JOHN PRESTON
IPC: H04R1/08
CPC classification number: H04R1/08
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28.Means for improving the sensitivity and the response characteristics of velocity microphones 失效
Title translation: 提高速度麦克风的灵敏度和响应特性的手段公开(公告)号:US2566093A
公开(公告)日:1951-08-28
申请号:US3619648
申请日:1948-06-30
Applicant: RCA CORP
Inventor: OLSON HARRY F , JOHN PRESTON
IPC: H04R9/08
CPC classification number: H04R9/08
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公开(公告)号:US2539672A
公开(公告)日:1951-01-30
申请号:US9046449
申请日:1949-04-29
Applicant: RCA CORP
Inventor: OLSON HARRY F , JOHN PRESTON
IPC: H04R1/24
CPC classification number: H04R1/24
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公开(公告)号:US2512467A
公开(公告)日:1950-06-20
申请号:US68741946
申请日:1946-07-31
Applicant: RCA CORP
Inventor: OLSON HARRY F , JOHN PRESTON
IPC: H04R9/08
CPC classification number: H04R9/08
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