TomTom has become a licensee of the Open Invention Network. The OIN was initially formed by Red Hat, IBM and others to protect Linux by being a clearing house for over 275 patents and patent applications. These are available, on a royalty free basis, to any member licensee. Members must agree not to use their own patent portfolio against Linux. Companies can also contribute their patents to the OIN to make them generally available. OIN is also one of the backers of Linux Defenders. It appears the recent Microsoft patent agitation against Tom Tom is the reason behind this move.