In the 1941 case of Muncie Gear Works, Inc. et al. v. Outboard, Marine & Manufacturing Co., the U.S Supreme Court ruled in favor of Outboard, Marine & Manufacturing Co., affirming a lower court's decision that Muncie Gear Works had infringed upon two patents held by Outboard related to marine propulsion technology. The dispute centered around whether or not certain elements of an outboard motor - specifically its clutch and propeller mechanisms - were covered under these patents. The Supreme Court agreed with the lower court's interpretation that they were indeed protected by patent law and thus upheld their ruling against Muncie Gear Works for infringement.

The dissenting opinion in the case of Muncie Gear Works, Inc. et al. v. Outboard, Marine & Manufacturing Co. et al., argued that the majority's decision to uphold a patent on an outboard motor design was incorrect because it did not meet the standard for novelty and non-obviousness required by patent law. The dissent contended that prior art - previous designs or knowledge available before the filing date of a claimed invention - clearly showed similar designs existed before this particular one was patented, thus making it unpatentable under U.S law which requires an invention to be new and not obvious at the time of its creation for it to qualify for a patent protection.