In 1879, Simon Seller received a patent for a "Toy Trumpet" that worked on the same principle as a kazoo: "By blowing through the tube A, and at the same time humming a sort of a head sound, a musical vibration is given to the paper covering c over the aperture b, and a sound produced pleasing to the ear." Seller's "toy trumpet" was basically a hollow sheet-metal tube, with a rectangular aperture cut out along the length of the tube, with paper covering the aperture, and a funnel at the end, like the bell of a trumpet. The first documented appearance of a kazoo was that created by an American inventor, Warren Herbert Frost, who named his new musical instrument "kazoo" in his patent #270,543 issued on January 9, 1883. The patent states, "This instrument or toy, to which I propose to give the name 'kazoo' "..." Frost's kazoo did not have the streamlined, submarine shape of modern kazoos, but it was similar in that the aperture was circular and elevated above the length of the tube. The modern kazoo—also the first one made of metal—was patented by George D. Smith of Buffalo, New York, May 27, 1902.