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AT33210B
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Arithmetic teaching aids.
Assignee: Bohumil Cizl
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Filing: 1907-07-16
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Granted: 1908-06-10
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Expires: 1927-07-16
Abstract
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Inventors
- 👤 Bohumil Cizl
Bibliographic Details
Application Number
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Jurisdiction
AT
Data Source
google_patents
Last Synchronized
2026-11-09 08:44
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