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The Cincinnati Enquirer, Gary Landers) MANDATORY CREDIT, NO SALES, Associated Press
This photo made Thursday, July 11, 2013, shows Jim Obergefell, right, and John Arthur after they returned from their wedding flight at Landmark Aviation at Cincinnati's Lunken Airport. The couple were married during a short ceremony on the plane, on the tarmac, at Baltimore/Washington International Thurgood Marshall Airport, after flying in from Cincinnati. John suffers from ALS, is bed-ridden, and is now in hospice care. A federal judge has ruled in favor of the two Ohio men who want their out-of-state marriage recognized John nears death, a case that's seen as encouraging for same-sex marriage supporters in Ohio.

CINCINNATI — Supporters and experts say a gay couple's success is getting their out-of-state marriage recognized in Ohio despite a state ban could lead to a rush of similar cases aiming to take advantage of an apparent legal loophole.

John Arthur of Cincinnati is dying of Lou Gehrig's disease. A federal judge on Monday granted him the right to be listed as married on his death certificate and to have his partner of more than 20 years listed as his surviving spouse.

At least four similar lawsuits are pending in New Jersey, Pennsylvania, Illinois and Nevada.

Harvard Law School professor Mark Tushnet says a social movement is at work.

But the president of the Ohio-based anti-gay marriage group Citizens for Community Values says he believes Arthur's case is an isolated one.