Patents by Inventor Lawrence L. Poulsen

Lawrence L. Poulsen 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).

  • Video densitometer with determination of color composition
    Patent number: 5420628
    Abstract: The measurement of gray scale or color composition integrated densities of irregularly shaped areas of a subject specimen is accomplished by using a video camera to derive an analog video image signal representative of the optical intensity of light associated with the specimen. A modified low cost high speed video digitizer converts the video image signal into a digital format which an interactive computer program converts into digital optical density values that are used to determine the net integrated density of each irregularly shaped area within the specimen.
    Type: Grant
    Filed: June 3, 1994
    Date of Patent: May 30, 1995
    Assignee: Research Development Foundation
    Inventors: Lawrence L. Poulsen, Daniel M. Ziegler
  • Video densitometer
    Patent number: 5194949
    Abstract: The measurement of integrated densities of irregularly shaped areas of a subject specimen is accomplished by using a video camera to derive an analog video image signal representative of the optical intensity of light associated with the specimen. A modified low cost high speed video digitizer converts the video image signal into a digital format which an interactive computer program converts into digital optical density values that are used to determine the net integrated density of each irregularly shaped area within the specimen.
    Type: Grant
    Filed: September 13, 1991
    Date of Patent: March 16, 1993
    Assignee: Research Development Foundation
    Inventors: Lawrence L. Poulsen, Daniel M. Ziegler