NORWOOD, Mass. -- Another chapter in the legal tug of war between Silicon Laboratories Inc. and Analog Devices Inc. for rights to Direct Access Arrangement (DAA) technology has been written this month.
The battle began in January when Austin, Tex.-based Silicon Labs filed suit against ADI and 3Com Corp. alleging patent infringement and trade secret violations (see Jan. 26 story). Analog Devices has now filed suit against Silicon Laboratories seeking an injunction against Silicon Labs' for the further manufacture and sale of infringing products, as well as monetary damages.
Responding to the original suit earlier this year, Analog Devices had said that its patent, awarded a year earlier, constituted prior art, and thus rendered Silicon Labs' patent unenforceable.
Silicon Laboratories said that the recent action by Analog Devices is "simply an effort to distract attention from this original legal action. The company also still contends that the Analog Devices silicon DAA products were developed using misappropriated confidential information, know-how and trade secrets of Silicon Laboratories and, consequently, infringe upon Silicon Laboratories' issued patent.
Silicon Laboratories, which recently filed a registration statement to sell $84 million in common stock in an initial public offering, reported in its prospectus that its sales in 1999 reached $46.9 million last year, the majority of which is derived from its DAA circuits.