Patents by Inventor Martin R. Kester

Martin R. Kester 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).

  • Copy protection of software for use in a private branch exchange switch
    Patent number: 5329570
    Abstract: An inexpensive software copy protection arrangement prevents the unauthorized use of customized software for a private branch exchange switch. The arrangement employs a process which recognizes the signature of typical unauthorized activities and freezes the administration capability of the private branch exchange switch when such signature is detected. By freezing the administrative capabilities, the addition, removal or change of an administrative port, extension or routing pattern on the private branch exchange switch is prevented.
    Type: Grant
    Filed: December 3, 1992
    Date of Patent: July 12, 1994
    Assignee: AT&T Bell Laboratories
    Inventors: Joseph F. Glassmacher, Joseph M. Greene, Martin R. Kester, Joseph L. LaCava