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Medtronic, NuVasive Spar Over Surgical Patents in Jury Trial

Medtronic Inc. and NuVasive Inc., makers of medical devices for spinal surgery, are each seeking to convince a San Diego federal jury that the other infringed patents relating to products used in minimally invasive surgeries.

Warsaw Orthopedic Inc., a unit of Minneapolis-based Medtronic, accuses San Diego-based NuVasive of infringing three patents for implants capable of being inserted translaterally between adjacent vertebrae, a plate and screw system used to stabilize vertebrae in the cervical spine and a tissue retractor, according to court filings.