FR1291983A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Improved sensitive photographic material, in white and black, capable of producing, by means of the formation of an auxiliary image, an effect equivalent to an increase in the original sensitivity
Assignee: Ferrania SpA
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Filing: 1961-06-09
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Granted: 1962-04-27
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Expires: 1981-06-09
Abstract
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Inventors
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Bibliographic Details
Application Number
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Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-29 03:35
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30
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