Patent US1880516A successfully refreshed from Google Patents.
Patent DE487685C successfully refreshed from Google Patents.
DE487685C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Device for determining the photographic depth of field
Assignee: Individual
•
Filing: 1928-07-25
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Granted: 1929-12-31
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Expires: 1948-07-25
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-04 22:00
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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