Patents by Inventor James J. Phelan

James J. Phelan 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 for processing essential lines in a communication system
    Patent number: 4497979
    Abstract: A telephone switching office having essential service protection is disclosed. As each service request is received it is put in a common queue. Periodically, and regardless of the load, the common queue is examined for requests that have not been served with a given time interval. If these requests are from essential lines, they are put in a special queue. When a server, such as a digit receiver or processor is available the special queue is served prior to the common queue.
    Type: Grant
    Filed: January 27, 1984
    Date of Patent: February 5, 1985
    Assignee: AT&T Bell Laboratories
    Inventor: James J. Phelan