Title: Cisco System's Statement about IPR claimed draft-rosenberg-dispatch-vipr-sip-antispam-00
Date: 11 November 2009 

Cisco is the owner of US Published Patent Application 20090022149 and US Patent 
Applications Serial Nos. 12370384, 12495615, 12608545, 12608484, and 12495639 
relating to the subject matter of "Session Initiation Protocol (SIP) Extensions 
for Blocking VoIP Spam Using PSTN Validation" <draft-rosenberg-dispatch-vipr-sip-antispam-00>. 

If technology in this document is included in a standard adopted by IETF and any 
claims of any Cisco patents are necessary for practicing the standard, any party 
will have the right to use any such patent claims under reasonable, non-
discriminatory terms, with reciprocity, to implement and fully comply with the 
standard.

The reasonable non-discriminatory terms are:

If this standard is adopted, Cisco will not assert any patents owned or 
controlled by Cisco against any party for making, using, selling, importing or 
offering for sale a product that implements the standard, provided, however that 
Cisco retains the right to assert its patents (including the right to claim past 
royalties) against any party that asserts a patent it owns or controls (either 
directly or indirectly) against Cisco or any of Cisco's affiliates or successors 
in title or against any products of Cisco or any products of any of Cisco's 
affiliates either alone or in combination with other products; and Cisco retains 
the right to assert its patents against any product or portion thereof that is 
not necessary for compliance with the standard.

Royalty-bearing licenses will be available to anyone who prefers that option.

For information contact:

Dan Lang
Director, Intellectual Property
Cisco Systems
+1 408-526-6672
standards-ipr@cisco.com