Patents by Inventor John R. Wyhof

John R. Wyhof 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: 5106219
    Abstract: A lightweight collapsible printer case for use with portable computers having two telescoping case sections, the case containing a series of telescoping roller shafts, a metal tape platen and carriage tracks which are housed within a tape reel, and a reel mechanism for coiling a carriage positioning cable. The collapsible printer case can be expanded from a collapsed travel/storage mode to an operational mode. In the operational mode the printer can print characters or graphics onto a standard 8.5" width sheet of paper or other media.
    Type: Grant
    Filed: October 2, 1990
    Date of Patent: April 21, 1992
    Assignee: Alps Electric (USA), Inc.
    Inventor: John R. Wyhof
  • Patent number: 4404574
    Abstract: A latent image is electrographically generated onto a dielectric record member from an energized electrode in close proximity with the dielectric layer of the member, and which image, if desired, may be readily developed and fixed. The system is particularly characterized in that the dielectric record member is a clear transparent, flexible film, which is made up of a resin film base, a conductive layer on the base, and a dielectric layer thereon. The dielectric layer has a thickness of about 1.4-10 micrometers. In the preferred embodiment of the invention, the dielectrtic layer includes an anti-blocking material which enables the film member to be unrolled from a roll holder and transported at a controlled rate uniformly and rapidly across an energized electrode so that a sufficient amount of charge can be transferred from the electrode to the film to provide a high contrast image.
    Type: Grant
    Filed: November 28, 1980
    Date of Patent: September 13, 1983
    Assignee: R.Q.O. Holding Company, Inc.
    Inventors: Herman Burwasser, John R. Wyhof
  • Patent number: 4112172
    Abstract: An improved dielectric imaging member comprising a transparent dielectric substrate having a thickness of between about 75 - 175 micrometers, a conductive layer on said substrate and a dielectric material having a thickness of less than about 15 micrometers on said conductive layer. An imaging process is also provided comprising generating an electrostatic latent image on said dielectric imaging member and developing said image by contact with a developer material.
    Type: Grant
    Filed: August 27, 1976
    Date of Patent: September 5, 1978
    Assignee: GAF Corporation
    Inventors: Herman Burwasser, John R. Wyhof