Software giant Microsoft has accused Motorola of violating seven patents in some of its Android based smartphone, in the argument it presented before the US International Trade Commission.

Microsoft’s patent infringement case against Motorola has started to be heard by the trade regulator. The operating system giant is demanding that certain Motorola devices should be banned from being sold in the US due to the infringement.

“We have a responsibility to our employees, customers, partners and shareholders to safeguard our intellectual property,” David Howard, Microsoft’s corporate vice president and deputy general counsel for litigation, said in an e-mail, Bloomberg reports.

“Motorola is infringing our patents and we are confident that the ITC will rule in our favour.” he added. Some of the Motorola phones that Microsoft hopes to get banned include Droid 2, Droid X, Cliq XT, Devour, Backflip and Charm.

Meanwhile, Motorola claims that it is ‘vigorously defending’ itself against Microsoft’s patent attack.

Google recently announced that it will be acquiring Motorola for $12.5 billion, something which will help it protect its Android platform from ‘anti-competitive’ litigation. Apple, Microsoft and Oracle are engaged in legal tussles with Android and its device makers like HTC and Samsung.