Items

• [PT5062], Patent Application, Thomas Alva Edison, August 21st, 1912
  1912-08-21
• [PT5062A], Legal Testimony, U.S. Patent Office. Examiner, October 5th, 1915
  1915-10-05
• [PT5062B], Legal Testimony, Frank Lewis Dyer, November 6th, 1915
  1915-11-06
• [PT5062C], Legal Decision, U.S. Patent Office. Examiners-in-Chief, January 6th, 1916
  1916-01-06