Patents by Inventor Douglas C. Wiegman

Douglas C. Wiegman 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).

  • Removable RAM package for ambulatory medical monitor
    Patent number: 4592018
    Abstract: A removable package for use primarily in an ambulatory monitoring device, such as a medical monitor includes a RAM and a power supply. The RAM package is connected to an external device via an edge connector which includes interlock means for sensing when the removable RAM package is properly connected to the external device in order to prevent inadvertent writes into the RAM. In a preferred embodiment of the invention disclosed, the removable RAM circuit also includes a microprocessor compatible real time timer which is connected to the same data and address buses as the RAM.
    Type: Grant
    Filed: August 29, 1983
    Date of Patent: May 27, 1986
    Assignee: Vita-Stat Medical Services, Inc.
    Inventor: Douglas C. Wiegman
  • X-ray system exposure control with ion chamber
    Patent number: 4230944
    Abstract: This invention relates to an X-ray system including an ion chamber for monitoring and controlling the amount of radiation delivered to the X-ray film.
    Type: Grant
    Filed: February 9, 1979
    Date of Patent: October 28, 1980
    Assignee: Advanced Instrument Development, Inc.
    Inventors: Douglas C. Wiegman, James A. Grichnik
  • X-ray measuring system
    Patent number: 4189645
    Abstract: A digital X-ray system for measuring X-ray beam quality such as the peak voltage applied to the X-ray tube and/or half value layer of the X-ray beam.
    Type: Grant
    Filed: June 28, 1978
    Date of Patent: February 19, 1980
    Assignee: Advanced Instrument Development, Inc.
    Inventors: Edward L. Chaney, Douglas C. Wiegman