Tit for tat: TomTom sues Microsoft for patent infringement

TomTom, the GPS vendor Microsoft sued last month for patent infringement, has filed a patent-infringement suit against Microsoft.

TomTom, the GPS vendor Microsoft sued last month for patent infringement, has filed a patent-infringement suit against Microsoft.

TomTom is alleging in its suit, filed on March 16, that Microsoft infringes with its Streets and Trips program on four TomTom patents.

Microsoft sued TomTom for for allegedly infringing on eight of its patents. Three of those patents centered around FAT, Microsoft's patented file-allocation-table technology -- and TomTom's implementation in the Linux kernel involving FAT.

It looks like TomTom isn't backing down from its refusal to become one of the growing list of companies signing cross-patent licensing agreements with the Softies.... And it looks like TomTom's suit isn't deterring Microsoft from its original complaints, either, based on the company's statement on TomTom's countersuit.

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