Items

• [D0911AAF], Letter from American Institute of Electrical Engineers, Elmer Ambrose Sperry to Thomas Alva Edison, February 27th, 1909
  1909-02-27
• [D8503O], Letter from Franklin Silas Terry, Elmer Ambrose Sperry to Thomas Alva Edison, February 14th, 1885
  1885-02-14
• [E1468AA1], Letter from Sperry Gyroscope Co, Elmer Ambrose Sperry to Thomas Alva Edison, February 17th, 1914
  1914-02-17
• [MF02AM], Letter from Elmer Ambrose Sperry, Sperry Gyroscope Co to Thomas Alva Edison, December 16th, 1915
  1915-12-16
• [MF04AY], Letter from Elmer Ambrose Sperry to Thomas Alva Edison, January 20th, 1916
  1916-01-20
• [MF05AW], Letter from Elmer Ambrose Sperry to Thomas Alva Edison, March 28th, 1916
  1916-03-28
• [MF06AI], Letter from Elmer Ambrose Sperry to Thomas Alva Edison, July 27th, 1916
  1916-07-27
• [MF08BF], Letter from Elmer Ambrose Sperry to Thomas Alva Edison, December 19th, 1916
  1916-12-19
• [MF13CE], Letter from Elmer Ambrose Sperry to Thomas Alva Edison, March 16th, 1917
  1917-03-16
• [X453XFL], Letter from Elmer Ambrose Sperry to Mina Miller (Mrs Thomas A.) Edison, July 15th, 1929
  1929-07-15
• [X453XGQ], Letter from Elmer Ambrose Sperry to Mina Miller (Mrs Thomas A.) Edison, August 1st, 1929
  1929-08-01
• [X453XHN], Letter from Elmer Ambrose Sperry to Mina Miller (Mrs Thomas A.) Edison, August 20th, 1929
  1929-08-20