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Patent drawing - Drawing of a Surveyor's Compass Public domain image
Zusammenfassung
This patent was designed by Samuel Kern.
Utility Patent Drawings
Public domain photograph of a technical diagram, architecture, plan, free to use, no copyright restrictions image - Picryl description
Berühmte Patentzeichnungen aus dem National Archives, Washington DC
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Datum
31/07/1846
Quelle
The U.S. National Archives
Copyright-info
No known copyright restrictions
