Patents Assigned to Frederick A. Major
  • Rechargeable transparent slide viewer apparatus
    Patent number: 4372068
    Abstract: Apparatus for viewing a transparency includes a rechargeable battery and a telescoping lens housing which moves inwardly and outwardly with respect to a housing in which is disposed the rechargeable battery, a light source, and a solid diffuser/reflector block for diffusing and reflecting light from the light source over substantially the entire area of the transparency.
    Type: Grant
    Filed: August 4, 1980
    Date of Patent: February 8, 1983
    Assignee: Frederick A. Major
    Inventors: Paul A. Knapp, Frederick A. Major