The Williamsport Wire Rope Company v. United States case in 1927 revolved around the issue of whether or not a patent for wire rope machinery was valid and enforceable. The Williamsport Wire Rope Company sued the U.S government, alleging that it had infringed on their patented technology by using similar machines to manufacture wire ropes at a navy yard. However, the Supreme Court ruled against them, stating that their patent was invalid due to lack of novelty as similar machines were already in public use prior to their application date. Furthermore, even if the patent had been valid, its enforcement would have been limited because patents do not extend to products made by the U.S government for its own use under sovereign immunity.

In the dissenting opinion for Williamsport Wire Rope Company v. United States, it was argued that the majority's decision to uphold a tax on wire rope sales was incorrect. The dissenting justices believed that this tax constituted an unlawful direct tax, which is prohibited by the U.S Constitution unless apportioned among states based on population. They contended that since wire ropes are tangible personal property and not securities or commodities traded on exchanges, they should be exempt from such taxation under existing laws and precedents. Furthermore, they disagreed with the majority’s interpretation of what constitutes income in relation to business transactions involving these goods; arguing instead for a narrower definition where only profits derived from their sale would qualify as taxable income rather than gross receipts as determined by the majority ruling.