RIM, Motorola exchange volley of patent lawsuits

The latest shot was fired by RIM, which filed off a suit alleging that Motorola has violated licensing commitments.

The Canadian company's filing came one day after Motorola filed a suit against RIM, claiming it violated some of Motorola's patents.

RIM is asking a court in Dallas to declare Motorola is breaching commitments it made to license essential patents to competitors on a fair and reasonable basis.

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