Durbrow Commission Co. v. Donner

The case is determined by the principles applicable to contracts in restraint of trade. Such contracts are against public policy and unenforceable unless they are incidental to and in support of a contract of sale by which the one making the agreement sells a business or some substantial interest therein, or are incidental to some other contract. 24 Am. & Eng. Ency. of Law (2d ed.) 851; 13 Corp. Jur. p. 477; 6 Ruling Case Law, p. 790; 3 Williston, Contracts, p. 2876, § 1637; U. S. v. Addyston Pipe & S. Co. 85 Fed. 271. In the cases involving contracts in restraint of trade that this court has…