Note signed C.D. Ludwig, D.D.S. [Charles D. Ludwig], St. Louis. Letter states, “This is to certify that Dr. Adam Flickinger of this City has been instructed in and obtained a license for the use of ‘a new process of hardening and enameling osteoplastic fillings.’ Patented February 29, 1876. This license is not transferable but in full force for a period of five years from date. It is understood that licensee has not the right to sell to others or instruct any one gratis in the working of this invention.” (accession number 80-0130), 1878 Mar 11, Box: 1, Folder: 2. Flickinger Family Papers, A2351. Missouri Historical Society Library and Research Center.

Note signed C.D. Ludwig, D.D.S. [Charles D. Ludwig], St. Louis. Letter states, “This is to certify that Dr. Adam Flickinger of this City has been instructed in and obtained a license for the use of ‘a new process of hardening and enameling osteoplastic fillings.’ Patented February 29, 1876. This license is not transferable but in full force for a period of five years from date. It is understood that licensee has not the right to sell to others or instruct any one gratis in the working of this invention.” (accession number 80-0130), 1878 Mar 11, Box: 1, Folder: 2. Flickinger Family Papers, A2351. Missouri Historical Society Library and Research Center. https://mohistory.mobiusconsortium.org/repositories/2/archival_objects/36937 Accessed November 22, 2024.