United States Patent System
In reviewThe United States patent system was built to secure ownership of new inventions, but for most of American history it explicitly and implicitly shut Black inventors—especially the enslaved—out of legal recognition and property rights for what they created. Its records show who was permitted to claim invention, not everyone who actually invented, which means the absence of a Black name on a patent is evidence of a barrier, not evidence of a lack of Black innovation.
1.Origins: A “color‑blind” law in a slave republic
From its founding statutes in 1790 and 1793, the U.S. patent system promised exclusive rights to the “original and first inventor” in exchange for disclosure of the invention, and it did so in race‑neutral language. In practice, that promise operated inside a slave society that denied Black people legal personhood. Patenting required swearing an oath as a qualified legal person and holding the patent as property; enslaved Black people, defined in law as property rather than persons, could not meet either condition. Free Black people technically fit the statutory language, and some—like Thomas L. Jennings in 1821—did secure patents, but their access was precarious and vulnerable to changing interpretations of citizenship.
2.The formal racial bar: *Invention of a Slave* and Dred Scott
The racial exclusion that had operated in practice was made explicit in 1858, when Attorney General Jeremiah S. Black issued the opinion known as *Invention of a Slave*. Building on the Supreme Court’s 1857 decision in *Dred Scott v. Sandford*, which denied Black people federal citizenship, Black declared that “a new and useful machine invented by a slave” could not be patented because the enslaved inventor could not contract with the government or swear the required oath. He further ruled that the enslaver could not patent the device either, because patent law restricted grants to the “original and first inventor,” and no rights existed that a slave could assign to the owner. By tying patentability to citizenship in this way, the opinion erected a formal racial barrier: both enslaved and many free African Americans were pushed outside the bounds of patent law, even as foreign nationals—including Africans—could apply by swearing an oath of their own citizenship.
3.What the law admits: enslaved invention without enslaved ownership
Cases that reached the patent office and public record make clear that enslaved people were inventing—and that the state recognized their inventiveness while denying them ownership. In the widely cited Ned cotton scraper case, an enslaved man named Ned devised an improved cotton scraper; his enslaver, Oscar Stewart, tried to patent it in his own name. The application was rejected on the grounds that Stewart was not the true inventor and that the actual inventor, being enslaved, could not receive or assign a patent, leaving the device outside the patent system even as Stewart openly advertised it as “the invention of a Negro slave.” Around the same period, Benjamin Thornton Montgomery, enslaved by Joseph Davis (brother of future Confederate president Jefferson Davis), developed a new riverboat propeller and attempted to patent it. The patent office, applying the Dred Scott logic, rejected him because as a slave he was not a citizen and thus could not take the oath; subsequent attempts by the Davis brothers to patent Montgomery’s invention in their names were also refused because they were not the “first and original inventor.” These decisions simultaneously affirmed that enslaved Black people were the inventors and legally barred both them and their enslavers from holding patents for their work.
4.The Confederate turn: owners’ patents on slaves’ inventions
White slaveholders read this outcome as an injustice against themselves, not against the enslaved. When the Confederate States of America created its own patent system during the Civil War, it explicitly rewrote the rules to allow enslavers to patent the inventions of their slaves, securing the owner’s legal title to intellectual property born from enslaved labor. Surviving accounts suggest that, despite this formal permission, no such patents were ultimately granted before the Confederacy collapsed, but the statute itself is revealing: it is an admission in law that enslaved people were doing inventive work significant enough to warrant protection, while the protection was designed to run only to their owners.
5.After emancipation: formal access, structural exclusion
The abolition of slavery and the Patent Act of 1870 removed the explicit racial bar by providing that “any person or persons” who invented a new and useful art, machine, manufacture, or composition of matter could apply for a patent. In theory, this opened the system fully to Black inventors; in practice, formerly enslaved and newly free Black Americans entered a landscape shaped by poverty, racism, and legal hostility. They confronted patent examiners who could delay or deny applications, lacked capital to pay filing fees or hire lawyers, and had little protection against theft of their ideas by white employers, partners, or investors. Many used white proxies to file or quietly assigned patents for nominal sums to white backers in order to get anything produced, separating their names from their inventions in the official record. Documented cases and family testimony around figures like furniture maker Henry Boyd—whose celebrated bedstead design circulated under a white partner’s stamped name—illustrate how Black invention could move into commerce without ever appearing in the Black inventor’s legal portfolio.
6.Reading the record: absence as evidence of the bar
The patent archive is often treated as a neutral ledger of who invented what; for Black American life, it must be read as a record of who was allowed to claim ownership. During slavery, enslaved inventors were categorically blocked from patents, and their enslavers were barred from claiming those inventions as well; during Reconstruction and Jim Crow, Black inventors faced a mix of formal access and practical exclusion that left many of their contributions unpatented, misattributed, or stripped of economic benefit. Under the archive’s doctrine of Presumption of Authorship, where Black labor, technique, and invention built devices, processes, and industries whose patents bear white names or no names at all, the burden lies on any counter‑claimant to show a different origin. Every question about “who really invented” a given American technology must therefore be framed against this patent history: the absence of a Black patent is not proof of non‑invention, but a sign of a system that was never built to record Black genius in its own name.
In the archive’s judgment, the United States patent system stands as one of the central legal structures through which Black technical genius was harvested and transferred to others. It is both a registry of invention and a record of racial exclusion: it preserved white claims to Black-made work while erasing the makers from the official story. Understanding its racial architecture is indispensable to reading every “who really invented this?” question in American life, and to restoring Black authorship where the paper trail was deliberately broken.
The family archive is admissible here. Photographs, letters, deeds, church programs, funeral bulletins, business records, recordings — the things that were kept when no institution was keeping them. A keeper reviews everything before it is admitted, and your name stays on it.