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公开(公告)号:US2615148A
公开(公告)日:1952-10-21
申请号:US14503750
申请日:1950-02-18
Applicant: AMERICAN OPTICAL CORP
Inventor: CRITOPH DAVID I
CPC classification number: G03B21/32 , G03B35/00 , Y10T477/327 , Y10T477/817
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公开(公告)号:US2591139A
公开(公告)日:1952-04-01
申请号:US78528447
申请日:1947-11-12
Applicant: AMERICAN OPTICAL CORP
Inventor: CRITOPH DAVID I
IPC: G03B23/12
CPC classification number: G03B23/12 , Y10T477/30 , Y10T477/363
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公开(公告)号:US2703045A
公开(公告)日:1955-03-01
申请号:US20114350
申请日:1950-12-16
Applicant: AMERICAN OPTICAL CORP
Inventor: GILBERT WILLIAM A , CRITOPH DAVID I
IPC: G03B21/16
CPC classification number: G03B21/16
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4.Incandescent light source and condensing system for optical projectors 失效
Title translation: 用于光学投影机的白炽灯光源和冷凝系统公开(公告)号:US2673489A
公开(公告)日:1954-03-30
申请号:US18597450
申请日:1950-09-21
Applicant: AMERICAN OPTICAL CORP
Inventor: CRITOPH DAVID I , GRADISAR ALBIN A
IPC: G03B21/20
CPC classification number: G03B21/208
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公开(公告)号:US2614458A
公开(公告)日:1952-10-21
申请号:US5622248
申请日:1948-10-23
Applicant: AMERICAN OPTICAL CORP
Inventor: CRITOPH DAVID I , HERRMANN JOHN F , WOLFORD FRED H
IPC: G03B23/12
CPC classification number: G03B23/12
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6.Unitary condenser lens assembly mounting means for projectors 失效
Title translation: 用于投影机的单体聚光透镜组件安装装置公开(公告)号:US2600975A
公开(公告)日:1952-06-17
申请号:US21040451
申请日:1951-02-10
Applicant: AMERICAN OPTICAL CORP
Inventor: CRITOPH DAVID I
IPC: G02B7/02
CPC classification number: G02B7/026
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7.Slide carrier for supporting lantern slides of varying thicknesses 失效
Title translation: 用于支撑不同厚度的灯笼滑块的滑架公开(公告)号:US2522760A
公开(公告)日:1950-09-19
申请号:US74692047
申请日:1947-05-09
Applicant: AMERICAN OPTICAL CORP
Inventor: LOWBER DAVID D , GRADISAR ALBIN A , CRITOPH DAVID I
IPC: G03B23/14
CPC classification number: G03B23/14
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