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Sony, Lenovo & others sued over batteries

3M claims patent infringement in the US

3M has filed suit against several big electronics companies, including Sony and Lenovo, for allegedly violating two patents related to lithium-ion battery technology.

In a suit filed in the US District Court of Minnesota, 3M charged Sony, Lenovo, Matsushita, Panasonic, Hitachi, CDW and others of violating patents related to the composition of the cathode, or positive electrode, used in lithium-ion batteries they manufactured, imported or sold in the US.

3M is seeking financial damages and an injunction from the court to stop the companies from infringing its battery patents.

"3M has suffered, and will continue to suffer, irreparable injury and damages," the company said in the complaint, asking that it be awarded treble damages for the harm allegedly caused by the defendants.

A Sony spokesman in Tokyo declined to comment, saying the company is still gathering information related to the suit. Matsushita also declined to comment, saying it had not yet received a copy of 3M's complaint.

Attempts to contact representatives at other companies named as defendants in the lawsuit were not immediately successful.


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