The game has become popular throughout the US and other countries. The first mass-produced toy marbles (clay) made in the US were made in Akron, Ohio, by S. C. Dyke, in the early 1890s. Some of the first US-produced glass marbles were also made in Akron, by James Harvey Leighton. In 1903, Martin Frederick Christensen—also of Akron, Ohio—made the first machine-made glass marbles on his patented machine. His company, The M. F. Christensen & Son Co., manufactured millions of toy and industrial glass marbles until they ceased operations in 1917. The next US company to enter the glass marble market was Akro Agate. This company was started by Akronites in 1911, but located in Clarksburg, West Virginia. Today, there are only two American-based toy marble manufacturers: Jabo Vitro in Reno, Ohio, and Marble King, in Paden City, West Virginia.