It looks like Facebook isn’t taking things lying down when it comes to Yahoo. The social network giant has filed a countersuit against the website in the light of a patent infringement claim made by Yahoo.

According to Florian Mueller from FOSSPatents, the social network’s alleging certain IP infringements of its own, claiming that Yahoo has run conflicted with ten of its patents. The patens in question range from ad placement and information arrangements on web pages to privacy tools for managing what information is shown to individual users and instant messaging using email protocol. This is another edition of the infamous legal battles that are all too common among tech giants in the Silicon Valley.