IPR Details
AT&T's statement about IPR claimed in RFC 3603

Submitted: June 2, 2005

Note: Updates to IPR disclosures must only be made by authorized representatives of the original submitters. Updates will automatically be forwarded to the current Patent Holder's Contact and to the Submitter of the original IPR disclosure.



'I'. Patent Holder/Applicant ("Patent Holder")

Holder legal name

'II'. Patent Holder's Contact for License Application

Holder contact name
Richard Palazzo
Holder contact email
Holder contact info

Intellectual Property Senior Specialist
AT&T Intellectual Property Licensing
180 Park Avenue
Florham Park, NJ 07932
T: +1 973-236-6693

'III'. IETF Document or Other Contribution to Which this IPR Disclosure Relates

RFC3603 ("Private Session Initiation Protocol (SIP) Proxy-to-Proxy Extensions for Supporting the PacketCable Distributed Call Signaling Architecture")

'IV'. Disclosure of Patent Information i.e., patents or patent applications required to be disclosed by Section 6 of RFC 3979

A. For granted patents or published pending patent applications, please provide the following information:

Patent, Serial, Publication, Registration, or Application/File number(s)

6,577,718; 10/370270; 11/055785
Date: 6/10/2003; 2/20/2003; 2/11/2005
Country: USA

Notes: Also unpublished patent application(s).

B. Does this disclosure relate to an unpublished pending patent application?:

Has patent pending

'V'. Licensing Declaration

The Patent Holder states that its position with respect to licensing any patent claims contained in the patent(s) or patent application(s) disclosed above that would necessarily be infringed by implementation of the technology required by the relevant IETF specification ("Necessary Patent Claims"), for the purpose of implementing such specification, is as follows(select one licensing declaration option only):

See Text Below for Licensing Declaration
Licensing information, comments, notes, or URL for further information

This is to advise the IETF that AT&T believes it owns intellectual property
(identified in section V above) that may relate to RFC 3603. To the extent that
the technology discussed in the above referenced IETF document(s) becomes an
IETF Standard, and to the extent claims of AT&T's patents are required to
implement the IETF Standard, AT&T agrees that, upon written request, AT&T will
offer, on a nondiscriminatory basis, non-exclusive licenses on fair and
reasonable terms under such patent claims to implement that IETF Standard.
AT&T's willingness to grant such licenses is conditioned upon the prospective
licensee granting a reciprocal license to AT&T under any patents that the
prospective licensee has to any technology required to implement that IETF

Written requests for licenses may be sent to:
AT&T Intellectual Property Licensing
Director, Intellectual Property
180 Park Avenue
Florham Park, NJ 07932

Note: The individual submitting this template represents and warrants that he or she is authorized by the Patent Holder to agree to the above-selected licensing declaration.

'VI'. Contact Information of Submitter of this Form

Submitter name
Richard Palazzo
Submitter email

Only those sections of the relevant entry form where the submitter provided information are displayed.