Kensey Nash Corp. (KNSY) agreed to nonbinding mediation in an effort to resolve royalty disputes with St. Jude Medical Inc. (STJ) regarding a vascular closure device in which Kensey claims it has been underpaid by more than $30 million.

In addition to royalty rates for the Angio-Seal vascular device, how long St. Jude is required to make the payouts also is under dispute.

Kensey, a medical device maker focused on regenerative medicine, has maintained that St. Jude since 2007 should have been paying a higher royalty rate of 8% under its licensing agreement for the Angio-Seal vascular device, rather than the 6% it has been providing. Kensey also is disputing St. Jude's claims that starting last month the royalty rate is to be reduced to 2%.

"St. Jude's action to reduce the royalty rate to 2% suggests that St. Jude Medical intends to assert that their obligation to pay any royalties to Kensey Nash will end in April 2014," Kensey Nash President and Chief Executive to Joe Kaufmann said. "Our strongly-held view is that, based upon the current design of the Angio-Seal device, St. Jude's royalty obligations to Kensey Nash extend at least through April 2016, and potentially through 2023."

Kensey in October reported that fiscal first quarter earnings fell 41% on higher costs, though as net sales rose 29%. However royalty income fell slightly, including a 3% drop in Angio-Seal royalties, which represented about 75% of Kensey Nash's royalty income.

St. Jude, also in October, reported better-than-expected third-quarter sales because of growth in products like devices that treat a type of faulty heart beat, but the company warned it continues to see a soft market for its biggest category, devices that shock the heart.

Shares of Kensey and St. Jude closed Thursday at $26.70 and $33.60, respectively. Neither was active in premarket trading.

-By Tess Stynes, Dow Jones Newswires; 212-416-2481; Tess.Stynes@dowjones.com

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