Patents by Inventor Jon D. Schaffer

Jon D. Schaffer 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).

  • Blood pressure monitor with compensation for physique and method of use
    Patent number: 4998534
    Abstract: An automated blood pressure measurement apparatus and method which includes an inflatable cuff at a predetermined height relative to where a user must sit or stand in order to comfortably use the apparatus including a correction arrangement which provides a numerical correction for a hydrostatic pressure differential between the heart level of a user in a posture implied by the predetermined height of the cuff based on the user's overall height and a standard posture for measuring blood pressure at which the cuff height is at approximately the same level as the heart level when blood pressure is measured.
    Type: Grant
    Filed: October 19, 1989
    Date of Patent: March 12, 1991
    Assignee: Medical Devices Limited Partnership
    Inventors: Philander P. Claxton, III, George L. McDade, Jon D. Schaffer
  • Blood pressure machine cabinet
    Patent number: D298167
    Type: Grant
    Filed: December 6, 1985
    Date of Patent: October 18, 1988
    Inventors: Jon D. Schaffer, George L. McDade
  • Blood pressure measuring system
    Patent number: D328130
    Type: Grant
    Filed: October 19, 1989
    Date of Patent: July 21, 1992
    Assignee: Medical Devices Limited Partnership
    Inventors: Philander P. Claxton, III, George L. McDade, Jon D. Schaffer
  • Blood pressure measuring system
    Patent number: D330592
    Type: Grant
    Filed: October 19, 1989
    Date of Patent: October 27, 1992
    Assignee: Medical Devices Limited Partnership
    Inventors: Philander P. Claxton, III, George L. McDade, Jon D. Schaffer