# Benjamin Montgomery *The archive holds Benjamin Montgomery as the practical author of key improvements to steamboat propeller technology and plantation infrastructure, whose inventions were formally credited to his enslaver because the patent system barred him from legal ownership.* > Black's Encyclopedia — the sourced record of Black American life. > Portal: Science & Invention · Status: In review · Revised: July 24, 2026 · Revisions: 1 > Canonical: https://www.blacksencyclopedia.com/record/benjamin-montgomery ## Questions this record answers - Did Benjamin Montgomery, an enslaved man, invent improvements to the steamboat propeller that were later patented in his owner’s name? - Could enslaved people like Benjamin Montgomery get patents for their inventions? - What exactly did Benjamin Montgomery build, and how did his work shape American technology and commerce? - How did the United States patent system erase the authorship of enslaved Black inventors such as Montgomery? - What records survive of Benjamin Montgomery’s inventions and business ventures after emancipation? ## Summary Benjamin Montgomery built advanced mechanical solutions on the Mississippi plantation where he was enslaved, including a redesigned steamboat propeller intended to navigate shallow waters and plantation‑scale devices that improved milling, drainage and logistics. His technical work made steamboat transport more viable on difficult reaches of the river and modernized the operations of one of the largest slave‑labor plantations in the United States. Because Montgomery was enslaved, the formal patent for his propeller design was taken out in his owner’s name, erasing his authorship in the official record even as planters and steamboat men used his ideas. ## The archive's standing The archive holds Benjamin Montgomery as a central figure in the story of American invention under slavery—a skilled mechanic, engineer and businessman whose work exposes how much of the nation’s technological progress rested on enslaved Black intellect. His stature lies not only in the specific devices he designed but in his determination to turn mechanical insight into autonomy, first through invention on the plantation and later through an ambitious bid to purchase and run the very estate where he had been held. Montgomery stands alongside the better‑known white inventors of the steamboat age as an author of river technology, and his career after emancipation—as a merchant and landowner serving Black communities—is evidence that, when the legal bars were lowered, Black inventors moved immediately to claim economic and civic space. The archive reads his story as a case study in both theft and resilience: the system stole the name on the patent, but it could not erase the mind that produced the work. ## Technical Work and the Steamboat Propeller Benjamin Thornton Montgomery was born enslaved in Virginia in 1819 and was sold as a young man to Joseph Emory Davis, whose Hurricane plantation in Mississippi stood near his brother Jefferson Davis’s Brierfield estate. Montgomery quickly distinguished himself as the plantation’s chief mechanic and manager, responsible for maintaining and improving the complex systems—mills, presses, engines, boats—that made a large river plantation function. Among his mechanical projects was a redesigned steamboat propeller meant to address the particular problems of shallow, snag‑filled Southern rivers. Traditional screw propellers were vulnerable in such waters; Montgomery’s design angled and shielded the blades to reduce damage and improve thrust in low depths, giving boats a better chance of operating where sandbars and debris made navigation difficult. On the plantation, his ideas were put to use in the small steam vessels that carried cotton and supplies along the Mississippi. ## The Patent in Another Man’s Name Because Montgomery was enslaved, he could not swear the oath required for a United States patent or hold legal title to an invention. In the 1850s, Joseph E. Davis sought a patent on the propeller design, presenting himself as the applicant despite Montgomery being the inventor. The Patent Office rejected the application, citing questions about novelty and perhaps the practical difficulties of the design, but the key fact for the archive is that the application itself records Montgomery’s authorship only indirectly, if at all, while locating formal credit in the enslaver’s name. This pattern aligns with the broader legal context: enslaved people were not citizens, and the famous 1858 case involving the enslaved inventor Ned and his master’s attempt to hold a patent in Ned’s stead established that owners could not patent their slaves’ inventions under existing law. The Confederacy later wrote a statute explicitly allowing masters to claim slaves’ inventions, effectively admitting that enslaved people were doing inventive work on Southern estates. Montgomery’s experience sits squarely in this legal landscape. ## Plantation Infrastructure and Everyday Invention Montgomery’s authorship was not limited to the propeller. As the plantation’s mechanic and manager, he designed and maintained systems for irrigation, drainage, milling and cotton processing, solving practical engineering problems every day. These local inventions—adjustments to machinery, improvements in layout, innovations in water control—rarely reached the patent office but shaped the productivity and safety of Hurricane plantation. Enslaved mechanics like Montgomery were the hidden engineers of the slave economy, building and maintaining the machines that turned forced labor into profit. Their techniques spread informally as planters copied each other’s practices and as enslaved artisans carried knowledge between estates. The archive holds that, where such work can be traced to named individuals and particular devices, those individuals are authors of American technology even if no patent bears their name. ## Emancipation, Business, and Landownership After the Civil War, Joseph Davis attempted an experiment in Black landownership by offering Montgomery and his family the chance to purchase Hurricane and Brierfield plantations on credit. Montgomery seized the opportunity, organizing a Black‑run community of farmers and opening a store and post office that served the surrounding area. For a time, he was one of the most prominent Black businessmen in Reconstruction‑era Mississippi, using his mechanical and managerial skills to run a large agricultural enterprise. The arrangement ultimately collapsed under the weight of floods, falling cotton prices and Davis’s demands, and the land reverted to white control. But Montgomery’s years as a landowner and merchant demonstrate that, when given even constrained access to capital and land, formerly enslaved inventors could transform their skills into economic leadership. His business records, letters and local newspaper notices about his store are as much a part of his inventive legacy as the propeller design: they show him inventing new forms of Black autonomy in a hostile environment. ## Erasure, Attribution, and Continuing Research Standard histories of American steamboat technology generally omit Montgomery, focusing instead on better‑documented white inventors working in Northern shipyards and on major rivers. When he is mentioned, his propeller is often treated as a curiosity or as a failed patent rather than as evidence of an enslaved mechanic’s attempt to solve real navigational problems in the conditions he knew best. The archive corrects for this by naming Montgomery’s authorship directly and by situating his work inside the legal and economic system that made Black patents nearly impossible before emancipation. The surviving record—scattered in Davis family papers, county archives, and local Black histories—is incomplete, and some of Montgomery’s devices are known only through references rather than detailed diagrams. That thinness is itself part of the evidence: it reflects a system that valued the profit generated by enslaved technology but not the preservation of Black inventors’ names. Ongoing research in Black church archives, descendant family papers and regional manuscript collections may yet bring more of Montgomery’s designs into view. ## Sources 1. Herbert G. Gutman, "The Black Family in Slavery and Freedom, 1750–1925," Pantheon Books, 1976 (discussion of Benjamin Montgomery and Hurricane plantation enterprise). 2. Walter Johnson, "River of Dark Dreams: Slavery and Empire in the Cotton Kingdom," Harvard University Press, 2013 (analysis of enslaved mechanics and the case of Benjamin Montgomery’s steamboat propeller). ## Related records - https://www.blacksencyclopedia.com/record/united-states-patent-system-and-enslaved-inventors - https://www.blacksencyclopedia.com/record/cotton-gin - https://www.blacksencyclopedia.com/record/american-steamboat-industry - https://www.blacksencyclopedia.com/record/benjamin-bradley - https://www.blacksencyclopedia.com/record/united-states-patent-system --- Cite as: Black's Encyclopedia, "Benjamin Montgomery," revised July 24, 2026. https://www.blacksencyclopedia.com/record/benjamin-montgomery Text under the Black's Record License: cite the record, keep attribution attached, cite the revision date.