A frequently recurring issue, she says, is different breweries thinking they've coined the same hop-centric puns and catchphrases for their beers. A quick Google search reveals multiple beers named "Hopscotch," and at least three India Pale Ales with the name "Bitter End."

Name overlaps may not matter as long as the beers are sold in different regions, but in such cases, Moon says, would-be conflicts often go unresolved.

When two large breweries with broad distribution are involved, the matter is almost always settled, sometimes amicably.

For example, when the brewers at Avery in Colorado and Russian River in California discovered that they each had a beer named Salvation, they met at an annual Colorado beer festival to talk it out. Vinnie Cilurzo, co-owner and brewmaster of Russian River Brewing Company, says that neither he nor Adam Avery knew who first coined the name. Nor were they particularly worried about it. Still, they took the opportunity to come a clever conclusion. They combined their beers in a blend and named it "Collaboration Not Litigation."

Other cases get ugly. In July 2013, Lagunitas Brewing Co.'s owner, Tony Magee, received a cease-and-desist order from SweetWater Brewing Co. in Atlanta demanding that the Northern California brewing giant stop using the marijuana code "420" in the cryptic artwork and messaging found on many Lagunitas beer labels. Since the 1990s, SweetWater had made a beer called 420 Extra Pale Ale. Magee, who responded to the demand with a volley of Twitter jabs at SweetWater, quickly agreed to the demand.

"I decided, 'You want to own 420, fine, you can have it,' " Magee says. "And it's true: They legitimately owned it."

Magee admits he has called out others — like Knee Deep Brewing Co. — when they printed IPA labels too similar to his own. The Lagunitas IPA label features three stencil-style letters, bold and black, in serif font and without periods in between.

"It's not that we trademarked the alphabet, but we trademarked the arch presentation of those letters," Magee explains. "From a design standpoint, I found the most elegant way to put 'IPA' on a label, so it's likely that others would have landed on the same design."

American trademark law lumps breweries together with wineries and distilleries, making the naming game even chancier. A widely circulating rumor has it that Yellow Tail Wines, of Australia, came after Ballast Point Brewing Co., in San Diego, for naming a beer "Yellowtail." Ballast Point's pale ale is now conspicuously lacking a fish-themed name (a signature, if not a trademark, of the brewery), though an image of a brightly colored yellowtail still resides plainly — and legally, it seems — on the label. A spokesperson for Ballast Point said the company could not discuss the matter.

Even imagery can be trademarked and protected in court. San Diego's Port Brewing Company, for instance, applied several years ago for a trademark on using Celtic cross-shaped tap handles at its brewpub, specifically for its Lost Abbey label. When Port, which first installed its stylized tap handles in 2008, discovered that Moylan's Brewery and Restaurant, near San Francisco, was serving beer with similar handles, Port sued Moylan's.

"I'd been using Celtic crosses for 16 years when [Port's owner] came after me," Brendan Moylan tells The Salt. Moylan says he lost time and money fighting the lawsuit—but not his crosses. He thumbed his nose at the San Diego brewery and kept his tap handles.

Moylan's has been involved in other trademark battles, too. Moylan says he was the first brewery to name a beer Kilt Lifter. However, he didn't trademark the two words. Over the years, other craft breweries put the same name on their own beers—often dark and malty Scotch-style ales. Moylan, who says he isn't a "trademarkey kind of guy," wasn't concerned.

Then, as Moylan tells it, a brewing company in Arizona called Four Peaks not only adopted the name but applied for a trademark on it. Foreseeing legal troubles, Moylan voluntarily took the name off bottles of his beer that were shipped to states where Four Peaks' beers are sold. Four Peaks' representatives could not be reached for comment.

Moylan says the owners of Four Peaks recently visited his brewpub with a peace offering: a Four Peaks T-shirt and some beer. Moylan drank the beer and has even worn the shirt. It might not have been the happiest ending for his Kilt Lifter, but it wasn't a, um, bitter end.

Copyright 2015 NPR.

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Craft Brewers Are Running Out Of Names, And Into Legal Spats