Knowles patents upheld against MemsTech

June 8, 2011 – BUSINESS WIRE — The US Court of Appeals for the Federal Circuit affirmed the US International Trade Commission’s (ITC) final determination that MEMS Technology Berhad’s (MemsTech) importation and sale of certain MEMS microphone packages infringes Knowles Electronics LLC’s US Patents 7,242,089 and 6,781,231.

The Court of Appeals held that Knowles’s patents are valid and enforceable, and affirmed the ITC’s exclusion order barring MemsTech from importing its infringing products into the U.S.

The patents in this case are part of a large portfolio of patents related to Knowles SiSonic MEMS microphones  and microphone packaging technology. These patents cover several variations of SiSonic microphones and manufacturing methods.

Knowles designs and manufactures advanced acoustic components and MEMS microphones for major cell phone companies and consumer electronic devices. Knowles is owned by the Dover Corporation. For more information, visit

Knowles was recently on the other end of a patent dispute, when the ITC found that Knowles MEMS microphones infringed on Analog Devices Inc.’s (ADI) patents.

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