Patent US624826A successfully refreshed from Google Patents.
Patent FR733424A successfully refreshed from Google Patents.
FR733424A
Expired / Lapsed
FR
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Improvements to intaglio engraving processes
Assignee: Leon Fontaine
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Filing: 1931-06-06
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Granted: 1932-10-05
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Expires: 1951-06-06
Abstract
No abstract record available.
Inventors
- 👤 Leon Fontaine
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-28 04:28
CPC Classifications
G; G03; G03F; G03F5/00; G03F5/20
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Total Claims: 0
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References Cited (Backward Citations)
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