Patents by Inventor Ralph D. Darnell

Ralph D. Darnell 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: 5043736
    Abstract: The invention comprises a portable locating unit useful both as a cellular telephone and portable global positioning system that provides latitude and longitude information remotely to a base unit display. The system includes a small hand held receiver that receives signals from a satellite global positioning system and timing and computing circuits to provide location information signals. The hand held unit also includes a modem and transmitter to a cellular telephone network which is connected to the base unit computational system and display. The location of an individual or object can thus be determined at the remote station through the use of the cellular telephone network.
    Type: Grant
    Filed: July 27, 1990
    Date of Patent: August 27, 1991
    Assignee: CAE-Link Corporation
    Inventors: Ralph D. Darnell, Claude C. Douglas