Patent EP0649637A1 successfully refreshed from Google Patents.
DE532233C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Process for equalizing the contrasts in the photographic reproduction of negatives
Assignee: GOTTFRIED SPIEGLER DR
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Filing: 1930-04-27
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Granted: 1932-04-05
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Expires: 1950-04-27
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-10-25 17:35
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/02
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