Image ID: SIL-CollectionUniteVol2Edis_0734
Cite this: Edison, Thomas A. (Thomas Alva). 1869. Collection of United States patents granted to Thomas A. Edison, 1869-1884. v.2, Washington.D.C. : U.S. Patent Office.
Supplied Caption: Drawing for Patent No. 227,229 for electric lights granted to T.A. Edison May 4, 1880
Original Caption: Electric-lights, No. 227,229 patented May 4, 1880