The Bathtub Trust was where the Standard Sanitary Manufacturing Company and forty-nine other companies engaged in anti-competitive practices in 1912. The case was heard by the Supreme Court of the United States as Standard Sanitary Mfg. Co. v. United States. Joseph R. Darling was a special agent of the United States Department of Justice who prepared the case. In 1915 he wrote "Darling on Trusts" a legal treatise.
- "Seller of Patent Can't Prescribe Prices or Sales of Product, Says Supreme Court.". New York Times. November 19, 1912. Retrieved 2009-07-23. "Attorney General Wickersham and the Administration of President Taft won a distinct victory to-day when the United States Supreme Court affirmed the opinion of the Federal District Court for Maryland that the Standard Sanitary Manufacturing Company and forty-nine other defendants, constituting the so-called Bathtub Trust, was a combination in restraint of trade and should be dissolved."
- "Joseph R. Darling Resigns". Christian Science Monitor. December 1, 1913. Retrieved 2009-07-23. "Joseph R. Darling, special agent of the department of justice, resigns to enter business Jan. 1 next. He prepared two government cases against the bathtub, harvester, motion picture and other so-called trusts."