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Specialty chipmaker

Altera

(ALTR) - Get Altair Engineering Inc. Report

was down 9.5% in preopen

Island

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trading on word late Friday that the company lost a patent infringement suit brought by rival

Xilinx

(XLNX) - Get Xilinx Inc. Report

.

The verdict concerned Altera's FLEX 8000 Programmable Logic Device family of chips. Altera said it would appeal. Xilinx was down 2.8%.