Google Inc. on Monday appealed the US District Court for the Northern District of California to dismiss a lawsuit filed by Oracle which claims that the internet search giant infringed its several patents.

The patent infringement lawsuit was filed by the Oracle against Google in August. The business-software firm claims that Google’s Android mobile operating system violates the intellectual property rights pertaining to Java platform. Oracle alleges 7 counts of patent infringement along with one count of copyright infringement.

On the other hand, Google denies any patent infringement. It is of the view that mobile phone and other mobile device manufacturers, who use makes use of its open-source Android OS, are permitted to use the Java technology in question.

In addition, the internet search giant stressed that Sun Microsystems Inc. had promised to make Java open-source before it was acquired by Oracle in a deal worth $5.6 billion earlier this year. Google added that Oracle had released some of Java’s source code in 2006 and 2007 to allow any software developer to use it for free.

Commenting on the issue, a spokesperson for Google said, “It's disappointing that after years of supporting open source, Oracle turned around to attack not only Android but the entire open source Java community with vague software patent claims.”

Google-backed Android OS is an open source platform. It is being used by a wide range of phone-manufacturers, including Motorola, HTC and Verizon Wireless. Sales of Android-powered handsets outshined sales Apple’s iPhone and RIM handsets in the US during six month ended August.