Patent drawing - for H. A. Whiting and W. J. Winghart's Umbrella and Cane Combined Public domain image
Zusammenfassung
Utility Patent Drawings
Public domain photograph of architecture design drawing, free to use, no copyright restrictions image - Picryl description
Berühmte Patentzeichnungen aus dem National Archives, Washington DC
Tags
Datum
29/08/1882
Quelle
The U.S. National Archives
Copyright-info
No known copyright restrictions