Patents by Inventor Richard A. Waldinger

Richard A. Waldinger 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: 5604688
    Abstract: A pocket calculator includes a casing having on its front face numeric and function keys and a numeric first liquid crystal display (LCD) and a message second LCD. Housed in the casing is a calculator network module housing and a first battery connected through a key operated switch contained in the network to energize the network and actuate the first LCD. An inverter IC integrated circuit and second battery are housed in the casing and actuate the second LCD, the battery being connected to the inverter input through a transistor switch rendered conductive in response to the energization of the calculator network. Alternatively, a message third LCD provided in which the message is devisualized upon the application of a voltage thereto with the energization of the computer. The second and third LCDs may be a single common unit with the faces of a section of a common LCD being coated with light polarizing layers which are optically mutually perpendicular.
    Type: Grant
    Filed: January 23, 1995
    Date of Patent: February 18, 1997
    Assignee: Tomax Enterprises, Inc.
    Inventors: William Chu, Richard A. Waldinger
  • Patent number: D352311
    Type: Grant
    Filed: April 8, 1993
    Date of Patent: November 8, 1994
    Assignee: 3 CPCO Corp
    Inventor: Richard A. Waldinger
  • Patent number: D362020
    Type: Grant
    Filed: August 11, 1994
    Date of Patent: September 5, 1995
    Assignee: 3 CPCO, Corp.
    Inventor: Richard A. Waldinger
  • Patent number: D369828
    Type: Grant
    Filed: December 2, 1993
    Date of Patent: May 14, 1996
    Assignee: Quick Point, Inc.
    Inventor: Richard A. Waldinger