DE615499C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Process for producing rasterless halftone reproductions, especially for security printing
Assignee: AUGUST ALFONS ALOIS HELM
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Filing: 1932-09-21
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Granted: 1935-07-05
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Expires: 1952-09-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-01 22:18
CPC Classifications
G; G03; G03F; G03F5/00; G03F5/24
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References Cited (Backward Citations)
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