[PT004-F] Abstracts of Edison's Abandoned Applications (1876-1885)
These nineteen numbered pages contain abstracts of more than one hundred of Edison's abandoned patent applications, covering the period 1876-1885. The abstracts are in the hand of Edison's assistant, William H. Meadowcroft. The SN-number in the left margin is the serial number assigned by the Patent Office. The abstracts are from a miscellaneous collection of materials that Meadowcroft assembled for the preparation of Edison: His Life and Inventions by Frank L. Dyer and T. Commerford Martin (New York, 1910). The 1929 edition of the biography acknowledges Meadowcroft as a co-author.
Courtesy of Thomas Edison National Historical Park.