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. 10, 2015
Filed:
Nov. 15, 2007
Applicants:
Rene W. Purnadi, Coppell, TX (US);
M. Khaledul Islam, Ottawa, CA;
Inventors:
Rene W. Purnadi, Coppell, TX (US);
M. Khaledul Islam, Ottawa, CA;
Assignee:
BlackBerry Limited, Waterloo, Ontario, CA;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H04M 11/04 (2006.01); H04M 3/51 (2006.01); H04Q 3/64 (2006.01); H04M 1/725 (2006.01); H04L 29/06 (2006.01);
U.S. Cl.
CPC ...
H04M 3/5116 (2013.01); H04Q 3/64 (2013.01); H04L 65/1016 (2013.01); H04M 1/72538 (2013.01); H04Q 2213/1337 (2013.01); H04Q 2213/13152 (2013.01); H04Q 2213/13176 (2013.01); H04Q 2213/13204 (2013.01); H04Q 2213/13248 (2013.01); H04Q 2213/13348 (2013.01); H04Q 2213/13389 (2013.01);
Abstract
A method is provided for indicating an IMS (Internet Protocol Multimedia Subsystem) emergency call back to a user equipment and an access network. The method comprises including in a message from a PSAP (Public Safety Answering Point) to the user equipment and the access network an indication that the emergency call back is from the PSAP.