Patents by Inventor Martin J. Fornek

Martin J. Fornek 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).

  • Apparatus for interfacing analog telephones and digital data terminals to an ISDN line
    Patent number: 5305312
    Abstract: An interface to an integrated service, digital network (ISDN) line for up to two analog dual tone, multifrequency telephones and up to four personal computers or data terminals. A stored program-controlled processor controls access to the ISDN line for the analog and digital interface circuits. The processor also provides access to switch-controlled ISDN features for the analog telephones (e.g., call waiting, call hold, etc.).
    Type: Grant
    Filed: February 7, 1992
    Date of Patent: April 19, 1994
    Assignee: AT&T Bell Laboratories
    Inventors: Martin J. Fornek, Dennis R. Kinn, Steven P. Meade, Blaine E. Welman