CH62890A
Expired / Lapsed
CH
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Scale for direct determination of the circumference and the content of the circle
Assignee: Franz Herkenrath
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Filing: 1912-12-11
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Granted: —
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Expires: 1932-12-11
Abstract
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Inventors
- 👤 Franz Herkenrath
Bibliographic Details
Application Number
—
Jurisdiction
CH
Data Source
google_patents
Last Synchronized
2026-11-03 06:04
CPC Classifications
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