HP sues firms that refill ink cartridges

Hewlett-Packard, much of whose profit comes from printer supplies, has sued two companies that sell refilled ink cartridges, but it stopped short of trying to block the refill business altogether.

On Friday, HP sued InkCycle in U.S. District Court for the western district of Wisconsin, alleging that the company's ink violates three HP patents. And on Monday, HP sued RhinoTek in U.S. District Court for the northern district of California, accusing RhinoTek of false advertising by using packaging that indicates its refilled HP printer cartridges are new.

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Story by Stephen Shankland