Patents by Inventor Margaret L. Hetfield

Margaret L. Hetfield 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).

  • Electroluminiscence display panel
    Patent number: D313431
    Type: Grant
    Filed: March 22, 1988
    Date of Patent: January 1, 1991
    Assignee: Digital Equipment Corporation
    Inventors: Stanley J. Jaskiel, Jr., Margaret L. Hetfield, Victor M. Samarov
  • Video display terminal
    Patent number: D329847
    Type: Grant
    Filed: April 2, 1990
    Date of Patent: September 29, 1992
    Assignee: Digital Equipment Corporation
    Inventors: Margaret L. Hetfield, Marcus Koepke
  • Wall mounted power supply module
    Patent number: D334733
    Type: Grant
    Filed: April 8, 1991
    Date of Patent: April 13, 1993
    Assignee: Digital Equipment Corporation
    Inventors: Stuart K. Morgan, Margaret L. Hetfield
  • Electronic device module
    Patent number: D336081
    Type: Grant
    Filed: April 8, 1991
    Date of Patent: June 1, 1993
    Assignee: Digital Equipment Corporation
    Inventors: Stuart K. Morgan, Margaret L. Hetfield
  • Electronic device module
    Patent number: D336082
    Type: Grant
    Filed: April 8, 1991
    Date of Patent: June 1, 1993
    Assignee: Digital Equipment Corporation
    Inventors: Stuart K. Morgan, Margaret L. Hetfield
  • Enclosure for electronic module
    Patent number: D336290
    Type: Grant
    Filed: April 8, 1991
    Date of Patent: June 8, 1993
    Assignee: Digital Equipment Corporation
    Inventors: Stuart K. Morgan, Margaret L. Hetfield
  • Electronic device module
    Patent number: D337761
    Type: Grant
    Filed: April 8, 1991
    Date of Patent: July 27, 1993
    Assignee: Digital Equipment Corporation
    Inventors: Stuart K. Morgan, Margaret L. Hetfield
  • Power supply module
    Patent number: D338653
    Type: Grant
    Filed: April 8, 1991
    Date of Patent: August 24, 1993
    Assignee: Digital Equipment Corporation
    Inventors: Stuart K. Morgan, Margaret L. Hetfield
  • Cover for wall mounted electronic equipment
    Patent number: D342523
    Type: Grant
    Filed: April 8, 1991
    Date of Patent: December 21, 1993
    Assignee: Digital Equipment Corporation
    Inventors: Stuart K. Morgan, Margaret L. Hetfield