Patents Represented by Law Firm Wolf, Greenfield & Sacks, Inc.
  • Patent number: 5902250
    Abstract: A method for determining the sleep state of a patient includes monitoring heart rate variability of the patient and determining sleep state based on the heart rate variability. The method also may include monitoring the frequency of eyelid movements and making the sleep state determination based also on the frequency of eyelid movements. A method for determining respiratory pattern includes monitoring heart rate variability by receiving heart beat signals and determining respiratory pattern from the strength of the signals. A home-based, wearable, self-contained system determines sleep-state and respiratory pattern, and assesses cardiorespiratory risk, of a patient based on the frequency of eyelid movements, the frequency of head movements, and heart rate variability of the patient.
    Type: Grant
    Filed: March 31, 1997
    Date of Patent: May 11, 1999
    Assignees: President and Fellows of Harvard College, Beth Israel Deaconess Medical Center, Inc.
    Inventors: Richard L. Verrier, J. Allan Hobson, Eric G. Lovett, Edward F. Pace-Schott
  • Patent number: 5745323
    Abstract: An apparatus and method for protecting semiconductor switching devices from damage due to electrostatic discharge is provided. The apparatus detects the occurrence of an ESD event, and turns the switching circuit to an operating state in which electrostatic charge is dissipated through the switching circuit. In embodiments of the invention, the switching circuit is a CMOS inverter circuit and the apparatus includes a PMOS transistor that upon occurrence of an ESD event couples an output of the inverter circuit to ground to discharge the electrostatic charge.
    Type: Grant
    Filed: June 30, 1995
    Date of Patent: April 28, 1998
    Assignee: Analog Devices, Inc.
    Inventors: Stephen T. English, Edward L. Wolfe
  • Patent number: D308310
    Type: Grant
    Filed: March 30, 1987
    Date of Patent: June 5, 1990
    Assignee: Chromcraft Furniture Corp.
    Inventor: Robert L. Wilson