LONDON – Wireless and audio chip vendor CSR plc has asserted a number of its patents against broadband communications company Broadcom Corp. CSR did not list the patents in its statement to the London Stock Exchange.
CSR (Cambridge, England) said the move, made on Friday August 20, was "a measured and prepared response" to a move made on Thursday August 19 by Broadcom (Irvine, Calif.) seeking to add patents to an infringement suit against CSR in a U.S. District Court for the Central District of California. CSR made its filing in the same court.
Those patents had already been asserted in an International Trade Commission case against GPS chip vendor SiRF prior to its acquisition by CSR in February 2009, CSR said in a statement. CSR added that, based patent re-examination request submitted by CSR, the U.S. Patent and Trademark Office has recently issued initial rejections of all patent claims previously asserted by Broadcom against SiRF before the ITC.
CSR said it was aware of the Broadcom litigation at the time of acquiring SiRF in 2009, and had planned for litigation with Broadcom. "We will continue our efforts to focus on competing in the marketplace on the basis of our products and serving the needs of our customers," CSR said in the statement.
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