Defendants sold their stock in a manufacturing corporation with a covenant in the contract to the effect that they would not engage in the sale or manufacture of bunghole appliances in the United States, east of the Mississippi, for a period of sixteen years. Held, a contract which does not permit one to engage in his trade anywhere within the state is one in general restraint of trade and is ipso facto illegal and void. Parish et al. v. Schwartz et al. (Ill. 1931) 176 N.E. 757.