Patents by Inventor Paul Kroll

Paul Kroll 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).

  • Data communication interface integrated circuit with data-echoing and non-echoing communication modes
    Patent number: 5159684
    Abstract: An integrated circuit communication interface device includes data bus terminals, a serial output terminal, a serial input terminal, and an internal data bus. A data bus buffer connects the data bus terminals to the internal data bus. A transmit buffer connects the serial output terminal to the internal data bus. A receive buffer connects the serial input terminal to the internal data bus. Control circuitry controls the buffer so that the device receives or transmits data in either the Echoplex protocol or the RS 232 protocol. The device includes a data register which is programmed to select the device's mode of operation.
    Type: Grant
    Filed: May 24, 1989
    Date of Patent: October 27, 1992
    Assignee: Pitney Bowes Inc.
    Inventors: Paul Kroll, Eugene P. Gerety, Earl B. Holtz