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Women’s inventions have addressed problems in homes, factories, rail travel and space imaging. A useful account needs to distinguish documented inventors and co-inventors from people whose work supported invention or helped make it visible. The examples below are historical cases documented by the National Women’s History Museum and the U.S. Patent and Trademark Office—not a ranking of the world’s most important inventors.
What counts as an invention—and who gets recognized?
A patent is one way to document an invention, but it is not a complete record of inventive work. The USPTO defines a U.S. patent as a government-granted property right that lets an inventor exclude others from making, using, selling or offering the invention for sale without permission for a limited period. Patent systems and rights differ by country.
Patents also have limits as a measure of innovation: some inventions are never patented, and a granted patent does not establish that an invention was commercialized or widely used. The UK Intellectual Property Office makes this distinction explicitly. Patent records are evidence of inventorship in particular cases, not a scorecard of ingenuity or impact.
Documented women inventors and inventions
| Inventor or inventors | Documented contribution | What the record establishes |
|---|---|---|
| Harriet R. Tracy | Gravity elevator | The National Women’s History Museum reports that Tracy held 16 patents and that her gravity elevator was installed in the Woman’s Building at the 1893 Columbian Exposition. |
| Maria Beasley | More buoyant life raft; barrel-making machines; bread kneader | The museum attributes 16 patents to Beasley and identifies these inventions among her work. |
| Mary E. Walton | Locomotive chimney | The museum identifies Walton’s chimney as one of several railroad-related inventions patented by women between 1865 and 1900. |
| Augusta M. Rodgers and Mary J. Wyatt | Smoke-and-cinder conveyors | The museum describes the two women as developers of these railroad-related devices. |
| Sarah Harmon | Locomotive-cab window | The museum says Harmon designed a window intended to protect the glass and improve the engineer’s visibility. |
| Ellen Ochoa | Optical inspection, optical object recognition and image-noise removal | The USPTO identifies Ochoa as a co-inventor on three patents related to these technologies; it does not attribute sole invention of a broad technology to her. |
Invention was not confined to the home
Women’s patenting included household goods and apparel, but also work in transportation, tools, industrial and agricultural machinery, construction and chemicals. In its historical analysis, the National Women’s History Museum says less than one-quarter of women’s patented inventions were in such nontraditional fields. That figure describes the museum exhibit’s historical analysis; it is not a timeless or worldwide estimate.
The exhibit notes that more than 40 women patented railroad-related inventions between 1865 and 1900. Walton, Rodgers, Wyatt and Harmon illustrate the range of practical problems they addressed, from smoke and cinders to visibility from a locomotive cab.
How women’s access and visibility changed
Access to patent institutions and public recognition shaped which contributions entered the record. Anne Freeman became the Patent Office’s first female patent examiner in 1872, according to the National Women’s History Museum. The exhibit suggests her appointment may have encouraged women to submit inventions, while stopping short of establishing that as a measured effect.
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Charlotte Smith campaigned for a published list of women patentees. In 1888, the Patent Office issued 500 copies of Women Inventors to Whom Patents Have Been Granted; the museum reports that four clerks spent ten days compiling it. The effort made women’s patenting more visible, even as the fields in which women worked were often judged through assumptions about what counted as technical invention.
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1Scan for outdated or missing drivers - takes under a minute2Repair Windows errors before they cause bigger problems3Fix the driver behind crashes, sound loss and screen glitchesThe museum also identifies Ida M. Tarbell as an inventor. Her words capture the debate over recognition: “What does the record show? Three things worth knowing and believing: that women have invented a large number of useful articles: that these patents are not confined to ‘clothes and kitchen’ devices as the skeptical masculine mind avers; that invention is a field in which woman has large possibilities.”
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What recent patent figures say about the gender gap
The World Intellectual Property Organization reported in 2025 that women accounted for 18.1% of inventors listed on international applications filed under the Patent Cooperation Treaty (PCT). WIPO said the share had risen by close to 7 percentage points over the prior 25 years. This is a figure for inventors named on international PCT applications, not a count of all inventors or all invention.
A national estimate uses a different scope and method. The UK Intellectual Property Office estimated that women represented between 7.8% and 10.9% of inventors on published applications filed to the UK IPO and via the PCT in 2024, depending on its matching approach. The report inferred sex from given names using WIPO’s World Gender Name Dictionary and warns that its methodology differs from earlier estimates. The UK estimate and WIPO’s international PCT share should not be treated as directly comparable.
Together, these records show both a long history of women’s inventive work and continued underrepresentation in patent data. They also show why any list of inventors should name the actual contribution, distinguish co-invention from sole invention, and treat patent counts as evidence—not as a complete measure of creativity or influence.
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