Patent JPS5227634A successfully refreshed from Google Patents.
JPS5227634A
Expired / Lapsed
JP
⏱️ 0.0 years remaining
Focus plate
Assignee: Minolta Co Ltd
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Filing: 1975-08-27
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Granted: —
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Expires: 1995-08-27
Abstract
Abstract PURPOSE: To provide a focus plate which has a little dim or obscure field when a diaphragm is actuated to the full by providing irregular indentations on a gimlet, anger or an inclined plane so as to give a bright defocus image nearly equal to the dimness or obscurity shown in the film. COPYRIGHT: (C)1977,JPO&Japio
Inventors
- 👤 Katsuhiro Ise
- 👤 Yoshio Kuramoto
- 👤 Yasuo Yamazaki
Bibliographic Details
Application Number
—
Jurisdiction
JP
Data Source
google_patents
Last Synchronized
2026-10-25 20:55
CPC Classifications
G; G03; G03B; G03B13/00; G03B13/18; G03B13/24
Claims Analysis
Total Claims: 0
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