RPX took note, among the USPTO assignment records made available during the first half of May, of the transfer of patents to frequent plaintiffs Leigh M. Rothschild and IP Valuation Partners (both of which received patents from Intellectual Ventures LLC) and BlackBird Tech LLC. RPX also took note of transfers of patents from multiple assignors to an NPE controlled by patent attorney Brian Yates—a California attorney revealed, by a January sanctions ruling in Texas, as controlling more entities than previously thought. Also among the noted transactions are outbound assignments by Panasonic, Pantech, and ZTE, and a transfer from Allied Security Trust’s Industry Patent Purchase Program involving former IBM and Nokia patents.

RPX took notice, among the USPTO assignment records made available during the latter half of April, of the transfer of patents to a number of frequent plaintiffs in patent litigation, including BlackBird Tech LLC; Intellectual Ventures LLC; IP Valuation Partners LLC; Unwired Planet International Limited, and Wi-LAN Inc. Assignors included Cypress Semiconductor, NXP Semiconductors, Panasonic, ROY-G-BIV, Samsung, and Sharp.