Patents by Inventor Paul W. Ralston

Paul W. Ralston 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: 4581483
    Abstract: Interface circuitry is provided for interconnecting a source of positional data such as a touch tablet with a computer interface. The circuitry acquires voltages from the source of positional data which represent the data. An acquired voltage is compared with a ramped voltage. At the time of crossover the internal capacitor of the computer interface is rapidly charged above the threshold level to provide positional data from the external source to the computer interface.
    Type: Grant
    Filed: March 30, 1984
    Date of Patent: April 8, 1986
    Assignee: Koala Technologies Corporation
    Inventor: Paul W. Ralston