Patents by Inventor Paul A. Hanrieder

Paul A. Hanrieder 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).

  • Digital switching system with shared analog line
    Patent number: 7058175
    Abstract: An auxiliary connection mechanism for allowing a Digital Switching System (DSS) to share an analog line with an analog device (via an auxiliary device port) is disclosed. The auxiliary connection mechanism includes a pair of relays for releasably connecting the auxiliary device port and the DSS to the analog line. When the analog line is idle, both the analog device and the DSS are connected to the line in order to receive incoming calls on the analog line. However, once one of the devices (either the analog device or the DSS) uses the line, the other device should not access the line. A busy line detect circuit is included to detect whether a device is using the line.
    Type: Grant
    Filed: July 1, 2004
    Date of Patent: June 6, 2006
    Assignee: Nortel Networks Limited
    Inventors: Paul A. Hanrieder, William Sung, Kevin W. Golka, Steven J. Rhodes, Richard G. Martin, Jeffrey Jay McIntosh
  • Digital switching system with shared analog line
    Patent number: 6771773
    Abstract: An auxiliary connection mechanism for allowing a Digital Switching System (DSS) to share an analog line with an analog device (via an auxiliary device port) is disclosed. The auxiliary connection mechanism includes a pair of relays for releasably connecting the auxiliary device port and the DSS to the analog line. When the analog line is idle, both the analog device and the DSS are connected to the line in order to receive incoming calls on the analog line. However, once one of the devices (either the analog device or the DSS) uses the line, the other device should not access the line. A busy line detect circuit is included to detect whether a device is using the line.
    Type: Grant
    Filed: September 9, 1999
    Date of Patent: August 3, 2004
    Assignee: Nortel Networks Limited
    Inventors: Paul A. Hanrieder, William Sung, Kevin W. Golka, Steven J. Rhodes, Richard G. Martin, Jeffrey Jay McIntosh