Invention Grant
- Patent Title: Photoelectric exposure meter
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Application No.: US17763537Application Date: 1937-12-01
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Publication No.: US2147961APublication Date: 1939-02-21
- Inventor: ALBRECHT BERNHARD , GUIDO BEYRICH
- Applicant: METRAWATT AG FABRIK ELEK SCHE
- Assignee: Metrawatt Ag Fabrik Elek Sche
- Current Assignee: Metrawatt Ag Fabrik Elek Sche
- Priority: DE2147961X 1936-12-08
- Main IPC: G01J1/04
- IPC: G01J1/04
Public/Granted literature
- US20220349750A1 VARIABLE TRANSMISSION APERTURE Public/Granted day:2022-11-03
Information query
