According to , Cisco has filed a lawsuit to void four TiVo DVR patents that Cisco says TiVo is wrongfully alleging infringement of. Cisco says TiVo has resisted granting a broad license to its technology because it would rather gain revenue from settling infringement lawsuits, according to the Reuters story.

"Absent a declaration of invalidity and/or non-infringement, TiVo will continue to wrongfully allege that Cisco DVRs and Cisco's customers infringe the TiVo patents, and thereby cause Cisco irreparable injury and damage," Cisco said in a statement to Reuters.

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Cisco sells DVRs through its Scientific Atlanta cable set-top box business. TiVo sells its own set-top boxes and licenses technology to cable TV operators.

Cisco sued in the federal court in San Jose. It seeks a court order that voids the TiVo patents or declares that Cisco and its DVRs are not infringing them, according to Reuters.