Patents by Inventor C. Ray Ballard

C. Ray Ballard 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).

  • Patent number: 4433212
    Abstract: A circuit for coupling digital or analog data signals to a telephone line. A direct coupled transistorized circuit is disclosed having three different impedance conditions: on-hook, off-hook, and loop-test. Consequently, data can be transmitted regardless of the on-hook or off-hook status of the associated telephone sets and regardless of whether or not the telephone sets are in use. In addition, data transmission can range over a frequency spectrum of approximately d-c to frequencies in the data-over-voice range. Because of the variable bridging impedance, the drive impedance is not too low during on-hook ringing and the circuit need not be disconnected during ringing or testing.
    Type: Grant
    Filed: June 21, 1982
    Date of Patent: February 21, 1984
    Assignee: Applied Spectrum Technologies, Inc.
    Inventors: Donald W. Moses, Charles Hustig, C. Ray Ballard
  • Patent number: 4425661
    Abstract: A communications system capable of simultaneously transmitting voice and data information. The spectral energy of the data signal is smeared by spreading it in a spectrum with energy packed in the lower frequency range under the conventional voice signal frequency in a manner which complements the standard C-message weighting curve. The use of the spread spectrum technique also eliminates thumping at the data rate since the harmonics that produce thumping are also spread throughout the bandwidth.
    Type: Grant
    Filed: September 3, 1981
    Date of Patent: January 10, 1984
    Assignee: Applied Spectrum Technologies, Inc.
    Inventors: Donald W. Moses, Charles Hustig, C. Ray Ballard
  • Patent number: 4425642
    Abstract: A co-channel communications system is disclosed which permits a digital data signal to be simultaneously transmitted with a communications medium signal such as telephone voice or television video. The data signal or signals are converted into very low multifrequency signals consisting of fundamental frequencies and harmonics which span the communications bandwidth. Because a number of frequencies are used for each data signal, the signal level of the data signals can be greatly suppressed relative to the communications medium signal to a level such that there is no perceptible degradation of the telephone voice or television video. Synchronous detectors for each frequency transmitted, including harmonic frequencies, are utilized to recapture and regenerate the data signals transmitted.
    Type: Grant
    Filed: January 8, 1982
    Date of Patent: January 10, 1984
    Assignee: Applied Spectrum Technologies, Inc.
    Inventors: Donald W. Moses, Charles Hustig, C. Ray Ballard