Patents by Inventor E. Dean Butler

E. Dean Butler 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).

  • Patent number: 5499063
    Abstract: A multifocal trial frame system includes a trial frame shaped to engage the head of a wearer and which includes an adjustable nose bridge and a pair of downwardly-depending studs which are laterally adjustable relative to the nose bridge, a pair of lens brackets adjustably attachable to the studs, each including first and second lens rims; a pair of distance prescription lenses shaped to be retained by the first pair of rims; and a pair of multifocal lenses shaped to be received by the second pair of rims. The multifocal lenses each include a neutral portion and an insert portion having a close-viewing prescription. The insert portion is incorporated into the neutral portion to form a continuous, unitary lens with the neutral portion, so that the distance and the multifocal lenses cooperate to simulate multifocal eyeglasses of a predetermined prescription and configuration.
    Type: Grant
    Filed: April 25, 1994
    Date of Patent: March 12, 1996
    Assignee: Vision Express Group Limited
    Inventors: E. Dean Butler, Craig H. Risk