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No. 394
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HEINL RADIO BUSINESS LETTER ^aJhington, D. C.
December 18, 193CJ.
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PATENT SUITS, TRADE-MARKS, DESIGN
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The following patents were granted during the week end¬ ing December 16, 1930:
1,784,825.
1,784,830.
1,784,839.
Speech Transmission. Homer W. Dudley, Teaneck, N. J. , assignor to Bell Telephone Laboratories, Inc. , New York N. Y. Filed September 5, 1929.
Mechanical Impedance Device. Paul Bc Flanders, East Orange. N. J. , assignor to Bell Telephone Laboratories, Inc. , New York, N. Y. Filed August 25, 1928.
Sound Reproducing System. Arthur C. Keller, New York, N. Y. , assignor to Bell Telephone Laboratories, Inc. , New York, N. Y. Filed June 30, 1928.
1.784.844. Constant Frequency Wave Source. Warren A. Harrison, Orange, N. J. , assignor to Bell Telephone Laboratories, Inci , New York, N, Y. Filed. October 18, 1927.
1.784.845. Phonograph Needle. Louis A. .Morrison, Brooklyn, N. Y. , assignor to Bell Telephone Laboratories, Inc. , New York N. Y. Filed October 4, 1928.
1,784,850. Picture Transmission. Fritz Schroter, Berlin, Germany, assignor to Gesellschaft fur Drahtlose Telegraphie ffl.b.H. , Berlin, Germany. Filed February 23, 1929, and in Germany March 3, 1928.
1,784,857. Electron-Tube Circuits. Manfred von Ardenne and
Heinert, Berlin, Germany, assignors to Radio Corpora¬ tion of America. Filed November 13, 1926, and in Germany August 25, 1925.
1,784,858. Sound-Recording System. Edward C. Wente, New York, N. Y assignor to Bell Telephone Laboratories, Inc. , New York N. Y, Filed February 10, 1928.
1,784,860* Sound Recorder. Charles F. Wiebusch, New York, N. Y. , assignor to Bell Telephone Laboratories, Inc. , New York N. Y. Filed August 25, 1928.
1,784,867. Signaling System. John F. Farrington, Flushing, N. Y. , assignor to Western Electric Co., Inc., New York, N.Y. Original application filed July 31, 1923, Patent No. 1,724,917, dated August 20., 1929. Divided and this application filed June 13, 1927.
1,784,869.
Rectifier. Frank Gray, New York, N. Y. , assignor to Western Electric Co. , Inc. , New York, N. Y. Filed March 31, 1926.
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