Patents by Inventor Mac R. Pohn

Mac R. Pohn 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).

  • Black light display system
    Patent number: 4791745
    Abstract: A lamp base houses a source of black light. An upstanding transparent acrylic sheet is edge lit by the black light source. Fluorescent paint on the surface of the acrylic sheet is excited by the black light, which causes the sign to light with an appearance somewhat similar to the appearance of a neon sign. The acrylic sheet is designed to snap into and out of the lamp base so that one sign may be substituted for another, quickly and easily.
    Type: Grant
    Filed: March 20, 1987
    Date of Patent: December 20, 1988
    Inventor: Mac R. Pohn