"Microsoft filed suit against TomTom today, alleging that the in-car navigation company's devices violate eight of its patents — including three that relate to TomTom's implementation of the Linux kernel. It's believed to be the first time Microsoft has filed a patent suit over Linux, after claiming for years that elements of the open-source operating system violate its patents. However, Microsoft says open-source software is not the intended focal point of the action. Five of the alleged patent violations relate to proprietary software. […] Microsoft has said previously that Linux and other open-source programs violate more than 200 of its patents — elevating the tension that has long existed between Microsoft and the open-source community. Asked if this TomTom case is the start of a broader legal campaign over those alleged violations, Gutierrez said no. "Microsoft respects and appreciates the important role that open-source software plays in our industry and we respect and appreciate the passion and the great contribution that open-source developers make in our industry," Gutierrez said. He said that respect and appreciation is "not inconsistent with our respect for intellectual-property rights." "