Patents by Inventor Ivan M. Lee

Ivan M. Lee 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).

  • Method and apparatus for interconnecting a messaging system and a private branch exchange
    Patent number: 5440616
    Abstract: Interconnecting a messaging system (voice, facsimile, and so forth) with a PBX which provides entirely digital voice transmission and which provides high bandwidth and redundant transmission of control information between the messaging system and the PBX.
    Type: Grant
    Filed: February 10, 1994
    Date of Patent: August 8, 1995
    Assignee: Rolm Company
    Inventors: Daniel A. Harrington, Maura E. Higgins, Ivan M. Lee, Joseph D. Remson, Kenneth E. Waln