Mary Kies Receives First U.S. Patent Issued to a Woman

Context

In the opening decade of the nineteenth century, the United States faced severe restrictions on foreign trade stemming from the Napoleonic Wars and the Embargo Act of 1807. These measures curtailed imports of European manufactured goods, including fashionable hats and millinery, and prompted federal encouragement of domestic production to meet local demand. New England households responded by expanding a long-standing cottage industry centered on straw bonnets, which provided essential income for many families, especially women.

At the same time, American women operated under significant legal constraints. Married women generally could not own property independently or enter contracts in their own names, and the patent system had only recently become accessible to them. The Patent Act of 1790 used inclusive language allowing “any person” to apply, yet few women had done so by 1809. The straw-hat trade, however, relied heavily on female labor and ingenuity, creating practical opportunities for technical improvements in weaving and finishing.

Connecticut’s Killingly area, including South Killingly, was particularly active in this regional economy. Local makers produced bonnets from readily available straw, but the finished products often lacked durability or aesthetic appeal compared with imported European styles. Inventors therefore experimented with ways to strengthen and beautify the weave without increasing cost.

What Happened

Mary Dixon Kies, born in 1752 and then married to John Kies, developed a method that interlaced straw with silk or thread in a cross-hatching pattern. The silk or thread reinforced the seams, producing bonnets that held their shape better and resisted wear while remaining lightweight and attractive. She prepared a patent application describing the process and submitted it to the U.S. Patent Office.

On May 5, 1809, President James Madison personally signed the patent document, an act that formally recognized Kies as the inventor. Contemporary records confirm the issuance, even though the original document itself was later destroyed. The technique quickly drew notice beyond Connecticut; First Lady Dolley Madison, an enthusiast of fashionable headwear, sent a letter of commendation highlighting its contribution to American manufacturing.

Kies’s approach proved both stronger and more economical than traditional straw-only braiding. Manufacturers in Massachusetts and elsewhere adopted elements of the method, contributing to a measurable expansion of domestic hat production at a moment when self-sufficiency was a national priority.

Aftermath

The immediate result was wider use of Kies’s weaving technique across New England hat-making shops, sustaining and growing the cottage industry through the War of 1812. Production figures rose sharply; Massachusetts alone reported more than half a million dollars in straw-bonnet output by 1810. Kies herself, however, realized limited financial gain. After her husband’s death in 1813 she relocated to Brooklyn, New York, to live with her son, and changing fashions eventually diminished demand for the particular style of bonnet her method supported.

The patent record itself survived only in secondary documentation. When the Patent Office burned in 1836, the physical document was lost, yet official registers preserved evidence of its existence and the date of issuance.

Legacy

Kies’s achievement stands as an early milestone in the recognition of women as independent inventors under U.S. law. Although earlier patents had sometimes listed women in connection with inventions, her grant in her own name helped normalize female participation in the patent system. Subsequent decades saw a gradual increase in patents issued to women, many of them for household and textile improvements.

In 2006 the National Inventors Hall of Fame inducted Kies, citing both the technical utility of her process and its symbolic importance. Historians view the episode as evidence of women’s practical economic contributions in the pre-industrial United States and as a precedent that encouraged later generations of female patentees, whose share of applications has continued to rise into the twenty-first century.