Tags: Activity, Sport.
Arena football is a variety of gridiron football played by the Arena Football League (AFL). It used to be a proprietary game (the rights to which were owned by Gridiron Enterprises) but the patent expired in 2007. The game is played indoors on a smaller field than American or Canadian outdoor football resulting in a faster and higher-scoring game. The sport was invented in 1981 and patented in 1987 by James F.
