Patents by Inventor James B. Koehler

James B. Koehler 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).

  • Option bus
    Patent number: 5631955
    Abstract: A method and apparatus for connecting remote options to a digital telephone base. Physical and communications protocols for connections and a flexible control scheme which can be as simple or elaborate as a given option requires are provided. The digital telephone includes an option bay connection, having a hierarchical control protocol. The option bay connection makes available several types of information, including: local analog audio, analog voice, digital voice, digital data and telephone control streams.
    Type: Grant
    Filed: May 15, 1995
    Date of Patent: May 20, 1997
    Assignee: Siemens Business Communication Systems, Inc.
    Inventors: Joel Q. Adams, David C. Black, William F. Dunn, Jr., Norman Endick, James B. Koehler, Michael K. Kounnas, John C. Krause, Diep N. Le, Larry A. Stell