Patents by Inventor Alfred E. Knowles

Alfred E. Knowles 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).

  • Belt buckle assembly having an image formed on a photosensitive face plate thereof
    Patent number: 4170808
    Abstract: The present invention relates to a belt buckle blank having an aluminum face plate that is anodized and which is photosensitive, and wherein additional properties and structural characteristics of said aluminum face plate is such that a negative photographic type image may be exposed to and developed on the aluminum face plate.
    Type: Grant
    Filed: September 6, 1977
    Date of Patent: October 16, 1979
    Assignee: Harlan J. Rath
    Inventor: Alfred E. Knowles