Patents by Inventor Reginald C. Hutchinson

Reginald C. Hutchinson 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).

  • Photoplethysmograph signal-to-noise line enhancement
    Patent number: 6699199
    Abstract: A ring plethysmograph having a pressure adjustment for locally pressurizing one side of a finger thereby biasing the pressure on an artery wall so that the plethysmograph is optimally sensitive without interfering with blood flow. An auxiliary photodetector, possibly with a second light source, is disposed on the low-pressure side of the finger for two purposes: providing a noise reference for canceling noise on the plethysmograph signal, and also for providing a separate motion signal for monitoring the activity level of a patient.
    Type: Grant
    Filed: June 11, 2002
    Date of Patent: March 2, 2004
    Assignee: Massachusetts Institute of Technology
    Inventors: Haruhiko H. Asada, Reginald C. Hutchinson, Phillip Shaltis
  • Photoplethysmograph signal-to-noise line enhancement
    Publication number: 20020169381
    Abstract: A ring plethysmograph having a pressure adjustment for locally pressurizing one side of a finger thereby biasing the pressure on an artery wall so that the plethysmograph is optimally sensitive without interfering with blood flow. An auxiliary photodetector, possibly with a second light source, is disposed on the low-pressure side of the finger for two purposes: providing a noise reference for canceling noise on the plethysmograph signal, and also for providing a separate motion signal for monitoring the activity level of a patient.
    Type: Application
    Filed: June 11, 2002
    Publication date: November 14, 2002
    Inventors: Haruhiko H. Asada, Reginald C. Hutchinson, Phillip Shaltis