July 16, 1925. Washington, D.C. "U.S. Patent Office." Information storage and retrieval in the analog age. National Photo Co. glass negative. View full size.
  BUY PRINT    July 16, 1925. Washington, D.C. "U.S. Patent Office." Information storage and retrieval in the analog age. National Photo Co. glass negative. | Click image for Comments. | Home | Browse All Photos