"A group has been formed to help protect Linux from being undermined by poor-quality software patents. Linux Defenders, launched on Monday, aims to enlist the developer community's help in finding 'prior art' related to patents affecting open-source code. Prior art is information relevant to a claim of originality in a patent. If examples of work are collected that show an invention has been described in prior art before the patent was granted, then that patent is invalidated. The sponsors of Linux Defenders are the Open Invention Network (OIN), the Software Freedom Law Center and the Linux Foundation."