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公开(公告)号:US2737583A
公开(公告)日:1956-03-06
申请号:US29615552
申请日:1952-06-28
Applicant: RCA CORP
Inventor: CROOKS HORATIO N , HOBBS LINDER C
IPC: H03K19/06
CPC classification number: H03K19/06
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公开(公告)号:US2912493A
公开(公告)日:1959-11-10
申请号:US47545854
申请日:1954-12-15
Applicant: RCA CORP
Inventor: CROOKS HORATIO N , BITTING JR ROBERT C
IPC: G11B27/024 , G11B27/36 , H04N5/783
CPC classification number: H04N5/783 , G11B27/024 , G11B27/36
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3.
公开(公告)号:US3519324A
公开(公告)日:1970-07-07
申请号:US3519324D
申请日:1967-12-27
Applicant: RCA CORP
Inventor: CROOKS HORATIO N
CPC classification number: G03H1/00 , Y10S359/90
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公开(公告)号:US2886799A
公开(公告)日:1959-05-12
申请号:US29123252
申请日:1952-06-02
Applicant: RCA CORP
Inventor: CROOKS HORATIO N
IPC: G11C19/04
CPC classification number: G11C19/04
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公开(公告)号:US2851677A
公开(公告)日:1958-09-09
申请号:US53611855
申请日:1955-09-23
Applicant: RCA CORP
Inventor: CROOKS HORATIO N
IPC: G11C19/04
CPC classification number: G11C19/04
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公开(公告)号:US3564130A
公开(公告)日:1971-02-16
申请号:US3564130D
申请日:1966-03-21
Applicant: RCA CORP
Inventor: CROOKS HORATIO N , HALLOWS RAYMOND L JR
CPC classification number: G09G1/06 , B41B19/01 , H04N1/4058
Abstract: A photocopy system provides a halftone image of a picture composed of continuous tones by producing a plurality of hollow halftone dots corresponding to the continuous tones. Each of the halftone dots comprises an annulus that has a size that corresponds to the density of a tone on the original picture.
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公开(公告)号:US2911621A
公开(公告)日:1959-11-03
申请号:US29123152
申请日:1952-06-02
Applicant: RCA CORP
Inventor: CROOKS HORATIO N
IPC: G11C19/04
CPC classification number: G11C19/04
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公开(公告)号:US2785305A
公开(公告)日:1957-03-12
申请号:US29615452
申请日:1952-06-28
Applicant: RCA CORP
Inventor: CROOKS HORATIO N , HOBBS LINDER C , KAELIN JR BRUNO A
IPC: H03K19/06
CPC classification number: H03K19/06
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公开(公告)号:US2635214A
公开(公告)日:1953-04-14
申请号:US24883951
申请日:1951-09-28
Applicant: RCA CORP
Inventor: CROOKS HORATIO N
IPC: H03K3/55
CPC classification number: H03K3/55
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