Patents by Inventor Mark V. Stanson

Mark V. Stanson 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).

  • Ringing signal supply
    Patent number: 4341928
    Abstract: A ringing signal supply, provided at a concentrator remote from a switching office, compares a fraction of its output with a low level reference ringing signal supplied from the switching office, and uses the comparison result to control a high voltage chopper which connects one of two d.c. supply voltages via a low pass filter to the output to produce the ringing signal at a desired frequency. A d.c.-d.c. forward converter produces the two d.c. supply voltages commonly for a plurality of ringing signal supplies whenever at least one of them is to produce a ringing signal.
    Type: Grant
    Filed: January 28, 1981
    Date of Patent: July 27, 1982
    Assignee: Northern Telecom Limited
    Inventors: Mark V. Stanson, Garth I. Riley