Patents by Inventor Leo K. Lehrer

Leo K. Lehrer 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).

  • Reflection densitometer with ellipsoid reflection surface
    Patent number: 4479714
    Abstract: A reflection densitometer includes an optical assembly formed with an ellipsoidal internal reflecting surface receiving light from a specimen at a target region located at one focus of the ellipsoidal surface and directing light to a photodetector at the other focus. A light source is mounted concentrically within the ellipsoidal surface, coaxially with the target and photodetector.
    Type: Grant
    Filed: April 14, 1981
    Date of Patent: October 30, 1984
    Inventor: Leo K. Lehrer