Kosher symbols, called hekshers, appear on all sorts of food, from meats and cheeses to potato chips and soft drinks.Some, such as a U or a K in a circle, are commonly known. But what if you found ...

“I don’t think we even had 1,000 followers on Instagram or $20,000 in sales, and they’re telling us that not only are we infringing on their trademark, which is a circle-shaped sandwich, but ...