Source:Dithridge-reflector
From Pittsburgh Streets
Edward Dithridge. "Design for a reflector." U. S. design patent 2,727, Aug. 6, 1867. http://pdfpiw.uspto.gov/.piw?Docid=D0002727, https://patents.google.com/patent/USD2727S.
Edward Dithridge. "Design for a reflector." U. S. design patent 2,727, Aug. 6, 1867. http://pdfpiw.uspto.gov/.piw?Docid=D0002727, https://patents.google.com/patent/USD2727S.