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us0d0007493
Keywords: Pittsburg;Pennsylvania;Allegheny;William F. Robb;John M. Robb

us0d0007493

File information
Filename:us0d0007493-001.jpg
Keywords:Pittsburg / Pennsylvania / Allegheny / William F. Robb / John M. Robb
Inventor's Name:Augustus H. Heisey
Patent Date:June 16, 1874
Pattern Name/Number:Unknown
Original Manufacturer:Unknown
Date added:Apr 21, 2019