Patents by Inventor Malcolm E. Carruthers

Malcolm E. Carruthers 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).

  • Device for displaying blood pressure
    Patent number: 4869262
    Abstract: A measure of diastolic blood pressure is provided by the product of HR and TT wherein HR is a measured heart beat rate and TT is an elapsed time between emission of an electrocardiographic R wave and arrival of the consequent blood pressure pulse at a chosen blood vessel.Apparatus is disclosed for sensing HR and TT and displaying a value or index of diastolic blood pressure, which is intended to be worn on the wrist and may serve also as a timepiece.
    Type: Grant
    Filed: May 16, 1988
    Date of Patent: September 26, 1989
    Assignee: Pulse Time Products Limited
    Inventors: Thomas Orr, Malcolm E. Carruthers