Invention Grant
- Patent Title: View finder for photographic cameras
- Patent Title (中): 摄影相机的查找器
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Application No.: US13810137Application Date: 1937-04-21
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Publication No.: US2149384APublication Date: 1939-03-07
- Inventor: HELMUT BECKER
- Applicant: LEITZ ERNST GMBH
- Assignee: Leitz Ernst Gmbh
- Current Assignee: Leitz Ernst Gmbh
- Priority: DE2149384X 1936-04-25
- Main IPC: G02B23/14
- IPC: G02B23/14
Public/Granted literature
- US10368689B2 Advanced heating device Public/Granted day:2019-08-06
Information query
