While Gregory did patent the "Conical Ice Cream Holder" in 1904, the claim that he invented the ice cream cone is debated. Some historians argue that a similar, unpatented design existed before Gregory's invention.
Regardless of the exact origin, Gregory's invention undeniably played a significant role in popularizing the now-ubiquitous ice cream cone. His invention changed the way we consume ice cream, leading to the evolution of various cone shapes, sizes, and flavors.