Patent FR837822A successfully refreshed from Google Patents.
FR837822A
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Calculating device for addition and subtraction
Assignee: Alois Hanke
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Filing: 1938-05-11
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Granted: 1939-02-21
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Expires: 1958-05-11
Abstract
No abstract record available.
Inventors
- 👤 Alois Hanke
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-25 17:19
CPC Classifications
G; G06; G06G; G06G5/00
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