Patented
Jan. 15, 1907
Feb. 18, 1908
Mar. 14, 1911
Jan. 14, 1913
Sept. 3, 1914
Oct. 6, 1914
June 1, 1915
Jan. 28, 1917
July. 8. 1917
Sept. 17, 1917
Oct. 22, 1918
Dec. 23, 1919
Aug. 22, 1922
Patents Pending
Property of Radio Corporation of America
Not Licensed for use by Ornts.