In the first half of May 2016, RPX saw nine patent transfers to NPEs recorded with the USPTO. At least three of those transactions involved patents that have already been asserted in litigation against operating companies.

Limestone Memory Systems LLC (LMS), a subsidiary of Acacia Research Corporation, sued Apple for alleged infringement of a group of semiconductor patents (5,805,504, 5,894,441, 6,233,181, 6,697,296). The patents-in-suit concern semiconductor memory chips and the programming of those chips; all four have been previously asserted by LMS, including in cases against Acer, Dell, HP, and Lenovo. LMS’s campaign is targeting devices that incorporate DRAM chips manufactured by Micron, including smartphones, tablets, and laptops. Micron was among the first companies LMS sued in this campaign, in February 2015.

Acacia Research subsidiary Limestone Memory Systems LLC (LMS) continues its campaign with suits against Acer, Dell, HP, Kingston Technology, and Lenovo. The defendants were all sued in LMS’s original filing from February of this year, but the new suits assert two patents that were not involved in the previous litigation(6,233,181, 6,697,296). The three patents asserted in LMS’s earlier filing are also asserted in these suits (5,805,504, 5,894,441, 5,943,260). All five of the patents-in-suit concern semiconductor memory chips and the programming of those chips. Similar to the previous suit, the recent cases accuse defendants of incorporating infringing chips produced by Micron. While Micron was a named defendant in the first suit, it is not sued in any of LMS’s new cases.

A newly created Acacia Research subsidiary, Limestone Memory Systems LLC (LMS), filed its first suit, naming Acer, Dell, HP, Kingston Technology, Lenovo, Micron, OCZ Storage Solutions, PNY Technologies, and Transcend. Micron’s DRAM chips are accused of infringement, and devices made by the other defendants in the suit are accused of incorporating those chips. The patents-in-suit concern semiconductor memory chips and the programming of those chips (5,805,504, 5,894,441, 5,943,260).