"Technology neutrality" is also called the "substantial non-infringing use principle" or the "ordinary commodity principle". Its meaning is: selling a product that has both legal and illegal uses can avoid legal liability for infringement. "Technological neutrality" was established by the U.S. Supreme Court in the case of "Universal Picture Studios v. Sony Corporation" in 1984, and is also known as the "Sony Standard" or the "Sony Principle." According to this principle, if "the product is likely to be widely used for legitimate, undisputed purposes", that is, "can have substantial non-infringing uses," even if the manufacturer and seller know that its equipment may be used for infringement, it is It cannot be presumed that he intentionally helps others to infringe and constitutes "contributing to infringement".