Patents by Inventor Paul van Berkum

Paul van Berkum 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).

  • Device for monitoring a switch
    Patent number: 5579368
    Abstract: A switch sentry device (22) having a digital telephony switch (SCX, 16), a device (24) for processing information, a device (24, 34) for simulating a call from the processing device (24) to the switch (SCX, 16), a device (SCX, 16) responsive to the call simulating device (24, 34) for simulating a primary ringing line (36) from the switch (SCX, 16) to the processing device (24), a device (SCX, 16) responsive to the call simulating device (24, 34) for simulation an alternate ringing line (38) from the switch (SCX, 16) to the processing device (24), and a device (24) for determining an inoperative condition of the switch (SCX, 16).
    Type: Grant
    Filed: April 29, 1994
    Date of Patent: November 26, 1996
    Assignee: Rockwell International Corporation
    Inventor: Paul van Berkum