Patents by Inventor Homer W. Dudley

Homer W. Dudley has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Secret telephony
    Patent number: 3985958
    Abstract: 1. In secret telephony, means to analyze speech message waves into slowly varying currents representative of energy variations in respective portions of the speech frequency band, distributor means for rapidly switching fragments of said currents to line in rotation, a source of masing currents for each of said slowly varying currents, the masking currents each varying in magnitude in random manner, and synchronously operating means for adding masking current from a respective source to each fragment of the switched currents.
    Type: Grant
    Filed: December 18, 1941
    Date of Patent: October 12, 1976
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: Homer W. Dudley