Patents Represented by Attorney Erwin Koppel

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  • Eye testing device for prescribing eyeglasses
    Patent number: 4129361
    Abstract: A device for determining a prescription lens for eyeglasses to be used by highly hyperopic patients, in which a frame mounted lens is inserted in a trial lens mounting to project on either side of the frame with one surface of the lens formed with an aspherical convex curvature and the other surface of the lens being concave and formed with a spherical curvature.
    Type: Grant
    Filed: March 10, 1977
    Date of Patent: December 12, 1978
    Inventors: Peter A. Bacotti, Frederick M. Kraft
  • Font of alphanumeric characters
    Patent number: D280528
    Type: Grant
    Filed: April 21, 1983
    Date of Patent: September 10, 1985
    Assignee: Allied Corporation
    Inventor: Saul Bass
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    Patent number: D280833
    Type: Grant
    Filed: October 13, 1983
    Date of Patent: October 1, 1985
    Assignee: Allied Corporation
    Inventor: David Thakar