In the 1932 case of Pobreslo v. Joseph M. Boyd Co., et al., the U.S Supreme Court dealt with an issue related to patent infringement and validity. The plaintiff, Pobreslo, held a patent for a specific type of valve used in internal combustion engines and alleged that the defendants had infringed upon his patent rights by manufacturing similar valves without his permission. However, the defendants argued that Pobreslo's patent was invalid as it lacked novelty and inventiveness - key requirements for any invention to be patented under US law. The court found in favor of the defendant after examining previous patents and inventions which showed similar designs predating Pobreslo’s claim. It concluded that there was no significant inventive step involved in creating this particular type of valve; hence it did not meet criteria necessary for obtaining a valid patent protection. This ruling reinforced two important principles: firstly, only truly novel inventions can be granted patents; secondly, anyone accused of infringing such rights has every right to challenge their validity based on evidence showing lack of novelty or non-obviousness.

In the dissenting opinion for Pobreslo v. Joseph M. Boyd Co., it was argued that the majority's decision to uphold a lower court ruling, which held Pobreslo liable for damages caused by his negligence in maintaining a building he owned, was incorrect. The dissenting justices believed that there were significant factual errors and misinterpretations of law in the lower court's judgment. They contended that Pobreslo should not be held responsible because he had leased out the property to tenants who assumed responsibility for its maintenance under their lease agreement. Therefore, they felt any liability should fall on these tenants rather than on him as an absentee landlord with no direct control over or involvement in managing and maintaining the property at issue.