Patents by Inventor Donald E. Van Arnam

Donald E. Van Arnam 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).

  • Retroreflectometer
    Patent number: 4368982
    Abstract: Apparatus and methods for measuring retroreflective properties of a surface are disclosed. The apparatus and methods are characterized in that the measured angle of divergence is varied while the angle of incidence is simultaneously varied.
    Type: Grant
    Filed: June 9, 1980
    Date of Patent: January 18, 1983
    Assignee: Avery International Corporation
    Inventors: Donald E. Van Arnam, Earl W. McFeaters, Richard R. Baggarley
  • Method for forming retroreflective sheeting
    Patent number: 4243618
    Abstract: A method is disclosed for forming a retroreflective sheeting having a plurality of retroreflective cube-corner prisms distributed over one of its surfaces such that the prisms are disposed in a planar array having a plurality of zones of prisms having differing angular orientations such that the zones have differing retroreflective brightness when illuminated by a light beam at a high angle of incidence.
    Type: Grant
    Filed: October 23, 1978
    Date of Patent: January 6, 1981
    Assignee: Avery International Corporation
    Inventor: Donald E. Van Arnam