Patents by Inventor Paul M. Cunningham

Paul M. Cunningham 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).

  • Burst frequency shift keying data communication system
    Patent number: 3944742
    Abstract: A communications system for transmission of low density digital data from a plurality of transmitters to a common receiver. It is a burst-mode frequency shift keying (FSK) communication system useable with a master antenna television (MATV) system that minimizes mutual interference between outputs of a large number of transmitters individually located with TV sets. The transmitters are combined with converters for transmission of programs through the system to individual TV sets as controlled by the users, and with information such as TV channel in use, room number identification, and specialized information such as completion of maid service, fire, and burglary alarms transmitted back through the system. In one system the transmitters use a carrier frequency of 12MH.sub.z, a frequency at the lower end of the passband of a coax system with FSK modulation at an equivalent switching rate of 20KH.sub.z and modulation index of 5 accepting a RF channel loading of up to 700 simultaneous users.
    Type: Grant
    Filed: April 1, 1974
    Date of Patent: March 16, 1976
    Assignee: Spectradyne, Inc.
    Inventor: Paul M. Cunningham
  • All saturated switching mode solid state RF amplifier
    Patent number: 3942117
    Abstract: An all saturated switching mode solid state gate device logic element used as an RF amplifier transmitter in a communication system.
    Type: Grant
    Filed: December 17, 1973
    Date of Patent: March 2, 1976
    Assignee: Spectradyne, Inc.
    Inventor: Paul M. Cunningham