Following the second lawsuit by Microsoft, it looks like Motorola has decided to retaliate by countersuing the biggest software maker in the world. The lawsuit, made by the mobile phone subsidiary of Motorola has accused Microsoft of copying 16 patents in PC, mobile and server software, and surprisingly Xbox products too.

Last month, Microsoft pointed a finger at Motorola for infringing 9 patents in Motorola handsets and on Tuesday, Microsoft sued the mobile company for licensing terms for technology which Microsoft uses in its Xbox game machines.

Is their middle name “Sue”?

“Motorola Mobility has requested that Microsoft cease using Motorola's patented technology and provide compensation for Microsoft's past infringement,” Motorola said. “Motorola has invested billions of dollars in R&D to create a deep and broad intellectual property portfolio and we will continue to do what is necessary to protect our proprietary technology.”

Motorola also labeled Microsoft’s lawsuits as “unfortunate” because”Microsoft has chosen the litigation path rather than entering into comprehensive licensing negotiations, as Motorola has mutually beneficial licensing relationships with the great majority of technology companies industry-wide.”

“We are still reviewing Motorola’s filing, which we just received,” said Horacio Gutierrez, deputy general counsel of intellectual property and licensing for Microsoft, in a statement.

“This move is typical of the litigation process and we are not surprised. We remain confident in our position and will continue to move forward with the complaints we initiated against Motorola in the U.S. District Court for the Western District of Washington and with the International Trade Commission,” he added.

Of late, Motorola has been in the midst of some big accusations. Recently, Motorola sued Apple for technologies in a range of products, which included smartphones and touchscreens.

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