Patents by Inventor Charles Krallman

Charles Krallman 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).

  • Modular computer system having self contained workslate unit detachably coupled to base unit including keyboard
    Patent number: 5264992
    Abstract: A computer base unit has a keyboard and computer peripherals. A removable workslate, capable of stand-along operation and containing a digitizer display, computer and rechargeable power supply attaches to the base unit through an interlocking connector that holds the workslate in a tilted position and connects the base unit and its peripherals to the workslate computer. The base unit and workslate comprise housings are constructed of a composite comprising layers of woven, resin impregnated fibers and a layer of electromagnetic shielding.
    Type: Grant
    Filed: February 11, 1993
    Date of Patent: November 23, 1993
    Assignee: Tusk, Incorporated
    Inventors: Per Hogdahl, William Hart, Charles Krallman, Kenneth Shaw