Microsoft is rejected on patents case

Seattle PI | at | by Mike

An appeals court on Friday rejected Microsoft's challenge to a $142 million trial loss over patents on a way to prevent software piracy.

"Substantial evidence supports the jury's verdict" that Microsoft infringed two valid patents owned by closely held z4 Technologies Inc., the appeals court in Washington, D.C., ruled.

The dispute is over a method for using product-activation codes to prevent the use of software by multiple users. Microsoft argued that the patents obtained by closely held z4's founder, David Colvin of Commerce Township, Mich., are invalid and weren't infringed.