In the case of Conley v. Mathieson Alkali Works, 1902, the United States Supreme Court dealt with a dispute over patent infringement. The plaintiff, Conley, accused Mathieson Alkali Works of infringing on his patented process for producing caustic soda and bleach powder using electrolysis. However, the defendant argued that they were not in violation as their method was different from what was described in Conley's patent claim. After examining both methods closely and considering expert testimonies presented by both parties during trial proceedings at lower courts, the Supreme Court ruled in favor of Mathieson Alkali Works stating that there had been no infringement on Conley’s patent rights because their manufacturing process did not use or replicate any elements unique to his invention.

In the dissenting opinion for Conley v. Mathieson Alkali Works, it was argued that the majority's decision to uphold a lower court ruling in favor of the defendant contradicted established legal principles regarding employer liability. The dissent contended that employers should be held responsible for injuries sustained by their employees due to unsafe working conditions, even if those conditions were not directly caused by negligence on part of the employer. It was further argued that this responsibility extends beyond providing compensation after an injury has occurred; employers must also take proactive measures to ensure worker safety and prevent accidents from happening in the first place. By absolving Mathieson Alkali Works of any blame or obligation towards its injured employee, Mr. Conley, despite evidence suggesting hazardous work environment at its factory site, it was believed that this ruling undermined these fundamental tenets of labor law and set a dangerous precedent for future cases involving workplace injuries.