On April 24, 2013, Ikaria, Inc., filed IPR2013-00253 on U.S. Patent No. 8083997, and InvenSense, Inc., filed IPR2013-00254 on U.S. Patent No. 6,034,419 on Semiconductor Device wtih a Tungsten Contact.
U.S. Patent No, 6,034,419
On April 23, 2013, Harland Clarke Holdings Corp. filed CBM2013-00016 on U.S. Patent No. 8,346,637, and Volusion, Inc. filed CBM2013-00017 on U.S. Patent No. 6834282 and CBM2013-00018 against U.S. Patent No. 7426481.
On April 26, 2013, Mobotix Corp. filed IPR2013-00255 on U.S. Patent No. 6970183.
