Patents by Inventor Ivor R. Axford

Ivor R. Axford 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).

  • Heart rate monitoring system for plural persons using radio telemetry
    Patent number: 5157604
    Abstract: An apparatus for simultaneously monitoring the heart rate of each of a plurality of subjects comprises a main circuit for transmitting a predetermined signal of predetermined frequency and duration and at predetermined time intervals to cause each of a plurality of remote subcircuits to transmit subcircuit identity data and heart rate data in predetermined timed sequence, a receiver for receiving remote subcircuit transmissions and producing an output representative of the heart rate of a subject and a plurality of remote subcircuits, each remote subciruit having a pulse monitoring device adapted to be secured to a subject for detecting and producing an output in response to a heart beat, and a detector for detecting the pulse monitoring device output and determining the number of the outputs which occur within a predetermined time interval, and being responsive to the main circuit predetermined signal for transmitting to the main circuit a signal representative of subcircuit identity data and the number of t
    Type: Grant
    Filed: January 17, 1989
    Date of Patent: October 20, 1992
    Assignee: Her Majesty the Queen in Right of Canada as represented by the Minister of National Defence
    Inventors: Ivor R. Axford, Duane B. Watson