Bridge Patents Research Advertisements and Photographs, 1839-1916, 1983-1994 (Includes facsimiles)

Materials were originally housed with Kemp’s research on United States bridge patents, which may have been collected in preparation for articles and books including American Bridge Patents: The First Century (1790-1890). This box includes photographs, photo negatives, reports, and facsimile advertisements and directories. Subjects include bridges, the patenting process, patents housed at the Smithsonian, and bridge companies.