In the case of W. S. Tyler Company v. Ludlow-Saylor Wire Company in 1914, the U.S Supreme Court ruled on a patent dispute between two companies involved in manufacturing wire screens used for sifting and sorting materials such as coal and ore. The plaintiff, W.S Tyler Company, claimed that Ludlow-Saylor Wire Co had infringed upon their patented design for a certain type of screen cloth known as "Tyrock". However, the defendant argued that this design was not new or novel but rather an obvious improvement over existing designs which did not warrant patent protection. The court agreed with the defendant's argument stating that to be eligible for patent protection under U.S law; an invention must be both new (non-obvious) and useful. In this case, they found that while Tyrock may have been more efficient than previous designs due to its unique arrangement of wires - it was essentially just a better version of something already well-known within industry circles thus failing to meet novelty requirements necessary for obtaining a valid patent. This decision reaffirmed principles established by earlier cases regarding what constitutes 'invention' under US Patent Law – namely that mere improvements or modifications made to existing products/processes are generally not considered inventive enough unless they involve some unexpected result or significant increase in efficiency beyond what would normally be expected from such changes.

The dissenting opinion in the case of W. S. Tyler Company v. Ludlow-Saylor Wire Company argued that the majority's decision was incorrect because it failed to properly interpret and apply patent law principles, particularly those related to novelty and non-obviousness requirements for patentability. The dissent believed that the patented invention at issue - a machine for making wire screens - did not meet these requirements as its design was merely an obvious improvement on existing technology rather than a novel invention deserving of exclusive rights protection under U.S patent laws. Furthermore, they contended that granting such broad patents could stifle innovation by preventing others from improving upon or modifying existing technologies without fear of infringement lawsuits.