Apple Legal has sent a letter to Lodsys saying that its existing license for patents regarding in-app purchases applies to iOS app makers as well.
According to Apple:
...Apple is licensed to all four of the patents in the Lodsys portfolio. As Lodsys itself advertises on its website, “Apple is licensed for its nameplate products and services.” See http://www.lodsys.com/blog.html (emphasis in original). Under its license, Apple is entitled to offer these licensed products and services to its customers and business partners, who, in turn, have the right to use them.
...the technology that is targeted in your notice letters is technology that Apple is expressly licensed under the Lodsys patents to offer to Apple’s App Makers. These licensed products and services enable Apple’s App Makers to communicate with end users through the use of Apple’s own licensed hardware, software, APIs, memory, servers, and interfaces, including Apple’s App Store. Because Apple is licensed under Lodsys’ patents to offer such technology to its App Makers, the App Makers are entitled to use this technology free from any infringement claims by Lodsys.
And at the end of the letter, Apple has this to say:
Therefore, Apple requests that Lodsys immediately withdraw all notice letters sent to Apple App Makers and cease its false assertions that the App Makers’ use of licensed Apple products and services in any way constitute infringement of any Lodsys patent.
You can read the letter in full over at Macworld.