Invention Grant
- Patent Title: Twin lens reflex camera with built-in spot photometer
- Patent Title (中): 双镜头反光相机，内置点式光度计
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Application No.: US49401465Application Date: 1965-10-08
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Publication No.: US3417684APublication Date: 1968-12-24
- Inventor: JACOB KREBS
- Applicant: JACOB KREBS
- Assignee: Krebs Jacob
- Current Assignee: Krebs Jacob
- Priority: US49401465 1965-10-08
- Main IPC: G03B7/02
- IPC: G03B7/02 ; G03B7/099
Information query
