Invention Grant US2149449A Scanning device 失效 Basic information Please log in to see more content Basic information Please log in to see more content Scanning device Patent Title: Scanning device Application No.: US1260635 Application Date: 1935-03-23 Publication No.: US2149449A Publication Date: 1939-03-07 Inventor: NYMAN LEVIN Applicant: RCA CORP Assignee: RCA Corp Current Assignee: RCA Corp Priority: GB919834 1934-03-23 Main IPC: H04N3/04 IPC: H04N3/04 Information query Espacenet IPC分类: H 电学 H04 电通信技术 H04N 图像通信，如电视 H04N3/00 电视系统的扫描部件；其与供电电压产生的组合 H04N3/02 .仅用光学机械装置的（H04N3/36优先） H04N3/04 ..具有活动光圈的
