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:
Nov. 15, 2011
Filed:
Mar. 16, 2007
Applicants:
Qiang Zhang, Fairfax, VA (US);
Jing Qu, Reston, VA (US);
Ramesh Kalathur, Fairfax, VA (US);
Inventors:
Assignee:
Nextel Communications Inc., Reston, VA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04M 3/42 (2006.01);
U.S. Cl.
CPC ...
Abstract
Systems and methods of establishing group calls are provided. Contact index information is synchronized between a communication unit and a contact synchronization server. A group call request message, including index information for one or more contacts, is sent from a communication unit to a signaling server. The signaling server uses the index information to obtain communication unit addresses from the contact synchronization server.