The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 03, 1995
Filed:
Sep. 26, 1991
John M Cotton, East Norwalk, CT (US);
Neil C Olsen, Milford, CT (US);
Alex T Wissink, Woodbridge, CT (US);
Gary V Pieper, Wallingford, CT (US);
William A Oswald, Oxford, CT (US);
Nicholas Necula, Mount Vernon, NY (US);
Enrique Abreu, Huntington, CT (US);
Maurice J Mascarenhas, Stamford, CT (US);
Rudy De Bruyn, Derby, CT (US);
IPC Information Systems, Inc., Stamford, CT (US);
Abstract
A conferencing device and method among terminals in a distributed digital telephone switching system is provided. The telephone switching system has a plurality of switching elements for interconnecting telephone units and telephone lines via communication links. A duplex path is set between each party in the conference and a designated bridge port. The speech from all the parties in the conference is summed and at the bridge port the sum is sent back to all engaged in the conference. As each party receives the sum, it subtracts its own speech data and therefore obtains the speech data from the other parties in the conference.