$615
Three Early Patent Models and a Hydraulic Pressure Apparatus, 19th/20th century, "Improvement on Lock Nuts," Frederick Oakley, no. 93,943, August 17, 1869, with original patent label, maple block with lock nut examples and signed "Fredk Oakley August 1869"; "Improvement in Soldering Apparatus," Fayette. S. Robinson, no. 200,875, March 5, 1878, with original patent label; "Flue-Cleaners," Ellis E. Lowell, no. 1,196,467, August 29, 1916, with United States and Canadian patent documents, with a collection documents regarding the pursuit of sale of the invention; a brass hydraulic apparatus by S.R. Beitler of the department of engineering at Ohio State University, with graduated circular brass weights for testing the pressure, housed in a gray-painted carrying box; and ten additional official issued patent documents.
Auctioneer:
Skinner
Date:
2015-04-21
