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DE559432C
Expired / Lapsed
DE
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Graduated index card or card holder with a protective fold attached to the lower edge
Assignee: PETER WILHELM BRANDENBURG
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Filing: 1929-08-22
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Granted: 1932-09-20
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Expires: 1949-08-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-09 04:43
CPC Classifications
B; B42; B42F; B42F19/00
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Total Claims: 0
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References Cited (Backward Citations)
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