Medical device giant Medtronic (NYSE:MDT) is looking for avenues to reverse a $10 million patent infringement loss over angiography catheters.

In January 2012 an Oklahoma jury ordered Medtronic to pay $9.9 million in back royalties for willfully infringing on a guidance catheter patent owned by Dr. Jan Voda, a decision that the company said it would seek to overturn.

"We respectfully disagree with the jury verdict and continue to maintain that our guide catheters do not infringe the Voda patent asserted in this district court case," Medtronic spokeswoman Wendy Dougherty told MassDevice at the time. "We are exploring all of our currently available options, which include appeal to the U.S. Court of Appeals for the Federal Circuit."

Voda invented new guiding catheters for delivering balloon devices and stents in the early 1990s and won patents in 2000, according to court documents.

Medtronic’s EBU guiding catheters, Voda argued, infringe existing patents. The Fridley, Minn.-based med-tech titan continued to sell and promote the EBU line after Voda informed them of the infringement, according to the documents.

A jury in the U.S. District Court for Western Oklahoma ruled that Voda’s patents are valid and that Medtronic Vascular’s infringement was willful.