The company behind Northern California’s Fieldwork Brewing Co. has sued a New Hampshire-based brewery for trademark infringement.

Far West Brewing LLC, which has done business as Fieldwork Brewing since 2015, claims that Newmarket, New Hampshire’s Deciduous Brewing Co. is trampling on its registered ‘Fieldwork’ trademark. In a complaint filed in U.S. District Court for the Northern District of California on Friday, Fieldwork claims that Deciduous Brewing has brewed at least a dozen of its own Fieldwork-branded India Pale Ales without permission.