Another day, another lawsuit. Unwired Planet, through its Nevada-based subsidiary, Unwired Planet LLC, has filed patent infringement complaints against Apple and Google in the U.S. District Court for the District of Nevada. The suits involve ... you guessed it ... patent infringement.

In two separate complaints filed in Reno, Nevada, Unwired Planet -- which calls itself " "the inventor of the mobile Internet" -- charges Apple with infringing 10 of its patents, and charges Google with infringing 10 different patents. Together, the two cases charge infringement of a total of 20 patents related to smart mobile devices, cloud computing, digital content stores, push notification technologies and location-based services such as mapping and advertising.

In the case against Apple, the complaint specifically alleges that infringing Apple products and services include, among others:

° Mobile devices (including mobile phones, tablets, and music players with the iOS operating system including iPhones, iPads, and iPods);

° Mobile digital content systems and/or services (including the Apple App Store, Apple apps, iTunes);

° Cloud messaging systems and/or services (including Apple's Push Notification Service, Siri);

° Map and location systems and/or services (including Apple Maps, Local Search, iAds, Safari web browser, Find My iPhone, Find My iPad, and Find My Friends).