175th Anniversary U. S. Patent System 1790 - 1965. Proceedings Vol. 1 and vol. 2
Washington DC: Patent Office Society, 1966. First edition. Trade Paperback Original. Blue covers, vol. 1 soiled on front cover, both volumes sunned at spines. Vol. 2 back cover and last 24 pages have water staining, more so at back cover and last 2 pages. Some wear and creasign to spine..... More