Top 15 Amazing Inventions by Women That Changed the World

Beyond her legendary performances in classic films, the stunning actress Hedy Lamarr is also celebrated as an influential inventor. Collaborating with composer George Antheil, she developed a device to jamming radio waves used in missile guidance systems. Her concept was ahead of its time, and today it continues to play a crucial role in technologies such as mobile phones, satellite encryption, WiFi, and Bluetooth.

Lamarr's innovative idea was to create a radio wave system that constantly changed frequencies, preventing it from being intercepted or blocked. Although patented in August 1942, the invention gained widespread use only two decades later during the Cuban missile crisis. This breakthrough laid the groundwork for modern wireless technologies, including mobile phones, Bluetooth devices, and WiFi.

Imagine living in a world without WiFi – it's hard to picture, right? And if Hedy Lamarr hadn’t developed the frequency-hopping idea in 1941, we might not have the widespread technologies we use today. Her brilliant invention truly laid the foundation for wireless communication systems as we know them.

Admiral Grace Murray Hopper was a groundbreaking computer scientist and a U.S. Navy officer. Not only did she create the first computer compiler for the Mark I, one of the earliest computers the size of a room, but she also introduced the terms 'bugging' and 'debugging,' which are still in use today. From 1967 to 1977, she served as the Director of the U.S. Navy’s Information Systems Planning Office, during which time she developed COBOL, one of her most significant achievements. COBOL, or Common Business-Oriented Language, was designed to serve the business, finance, and government sectors.

COBOL was made to be easy to write, read, and modify, which contributed to its lasting success. By 2006, Gartner reported that 60% of professional computer programs were still being written using COBOL. Alongside Hopper, Ada Lovelace, another remarkable woman, is credited with writing the first-ever computer program. In 1843, Lovelace worked with mathematician Charles Babbage to translate the functions of his Analytical Engine, creating what is considered the world’s first computer program. This made Ada Lovelace the first computer programmer in history.

Stephanie Louise Kwolek was born on July 31, 1923, in New Kensington, Pennsylvania, to a Polish-American family. From an early age, Kwolek dreamed of becoming a doctor, but financial difficulties prevented her family from affording medical school. In 1946, she graduated with a degree in chemistry from Carnegie Mellon University in Pittsburgh. Soon after, she joined DuPont’s chemical laboratory in Wilmington, where she made a world-changing discovery: Kevlar. Kevlar is a strong, rigid aramid fiber widely used in reinforcing synthetic materials for bulletproof vests and protective gear. According to DuPont, since the 1970s, bulletproof vests made from Kevlar have saved over 3,000 police officers’ lives in the U.S. Even today, Kevlar continues to evolve, with improvements in strength and a significant reduction in weight compared to its original form.

Beyond bulletproof vests, Kevlar is now used in a variety of applications worldwide. It is found in tires, firefighter boots, hockey sticks, cut-resistant gloves, optical fibers, fireproof mattresses, car armor, and even canoes. Kevlar is also used in the construction of bulletproof and bomb-resistant buildings and safe rooms to protect against storms. Additionally, Kevlar strengthens the load-bearing capacity of bridges and roadways.

The research that led to the creation of Kevlar began in the 1960s, a time when women in science were still a rarity. Kwolek led a research team at DuPont with the goal of developing a material strong enough to replace steel in radial tires. Nearly a decade later, researchers used Kevlar to develop bulletproof vests. In 1975, the first Kevlar vests were issued to police departments across the U.S. Over time, these vests were enhanced with more layers of Kevlar to increase safety. By 1990, ceramic plates were added to improve fire resistance. Since then, protective gear has been continuously refined, based on Kwolek’s original Kevlar invention.

Sarah Elisabeth Jacobs, who later became Sarah Goode, was born in 1855 in Toledo, Ohio, as the second of seven children to Oliver and Harriet Jacobs. Her father, a carpenter from Indiana, was enslaved until the end of the Civil War. After gaining her freedom, Goode moved to Chicago and eventually became a businesswoman. She and her husband, Archibald, also a carpenter, ran a furniture store together. The couple had six children, three of whom reached adulthood. Many of Goode's customers were working-class people living in small apartments with limited space for furniture, especially for a bed. This prompted her to create a solution to meet the needs of these crowded living conditions.

Goode invented a folding bed that allowed people living in cramped spaces to optimize their use of available room. When folded, the bed resembled a table with storage space. At night, it could be unfolded into a full-sized bed. This innovative design allowed the bed to serve as both a functional table during the day and a comfortable bed at night. By 1885, Goode patented her folding bed and became the first African American woman to receive a U.S. patent. This accomplishment was a significant milestone, not just for African Americans but for women, particularly African American women. Her invention filled a practical need in the lives of many, and it was highly valued. Goode's success opened doors for future African American women inventors to patent their own creations.

The dishwasher was invented by Josephine Cochrane in 1886, as part of an effort to ease household chores for herself and other housewives. The mechanism of her dishwasher is still in use today, as it was a remarkably effective design. Contrary to what one might expect, Cochrane was not concerned with the task of washing dishes per se—she came from a wealthy family with plenty of servants.

However, dissatisfied with the careless handling of her fine china by the household staff and drawing on her mechanical engineering background (inherited from her grandfather and father), Cochrane decided to invent a machine that would wash dishes more efficiently. Her dishwasher used hot water and pressure to clean the dishes, which was a revolutionary improvement over earlier dishwashing inventions. This design remains the basis for dishwashers used today.

Initially, Josephine Cochrane (from the U.S.) only wanted a tool to prevent servants from damaging her fine china while also saving her own time and hands. But from this simple desire, she unexpectedly became famous worldwide for creating the first dishwasher.

In 1903, Mary Anderson conceived the idea of a manual windshield wiper for cars, but it wasn’t initially accepted. At the time, people believed it was safer to drive in rain or snow without the assistance of a wiper to improve visibility, leading to the neglect of her invention. It wasn’t until later when Charlotte Bridgwood introduced an automatic version that the true revolution began.

Mary Anderson’s original patent for the hand-operated windshield wiper in 1903 was overlooked. Despite being patented, it wasn’t widely adopted. It was only much later that people began to recognize the importance of the windshield wiper for driving safely in bad weather conditions. Interestingly, the first automatic wiper was also the invention of a woman – Charlotte Bridgwood.

Created by a simple American woman, the windshield wiper saved drivers from the tedious task of stopping to clear snow or fog from their windshields. By 1916, the windshield wiper became a standard feature in all cars in the U.S. and remains essential today. The idea struck Mary Anderson while driving through New York City in 1903. She observed that drivers often had to stop to wipe the snow or fog from their windows, and some even stuck their heads out of the window to continue driving. From a woman's perspective, Anderson realized there had to be a solution that allowed drivers to clear their windshields without stopping. She designed the first wiper system and was granted a patent in 1905.

Caresse Crosby (born Mary Phelps Jacob) was granted the first patent for the modern bra in the United States in 1910. In preparation for a formal event, she wore a rigid corset beneath her evening gown, describing the experience as wearing a boxy armor made from whalebone and rope poking through her dress. She then asked her maid for two handkerchiefs and some pink ribbon to fashion a simpler, more comfortable undergarment.

Crosby's invention became the topic of conversation at the party. The other women were curious about how she was able to dance so freely. She revealed her creation, and they immediately asked her to make one for them. After some women offered her a dollar for a bra, Crosby decided to start a business and filed for a patent for her bra design in 1914.

Though she received a few orders from department stores, her business didn’t succeed as expected. Following her husband’s advice, Crosby sold her patent to the Warner Brothers Corset Company in Connecticut for $1,500. The modern bra patent was granted to Caresse Crosby in New York.

The year 1843 marked an important milestone when Nancy Johnson became one of the most significant figures in human history by inventing ice cream. Even more remarkable is that her design is still used today. This essential kitchen tool was the brilliant invention of Nancy Johnson. In 1843, she created the first hand-cranked ice cream maker. Her device consisted of a wooden bucket with a metal core inside. To make ice cream, ice was packed around the metal core, and the cream mixture was churned inside until it reached the desired consistency. This hand-cranked ice cream maker, known as the 'salted ice cream method,' required salt to lower the freezing point, allowing the ice cream to freeze as it was churned.

Today, making hard ice cream has been fully automated with modern machinery, much like soft-serve ice cream machines. There are now various brands of ice cream makers around the world. The ice cream industry has grown exponentially, with consumption reaching record levels. This invention holds great significance in the global culinary world, and to this day, it serves as the foundation for modern ice cream makers.

Tabitha Babbitt, an American toolmaker, invented the band saw, which was first used in a sawmill in 1813. After observing the difficult labor of woodworkers pulling crude saws, she decided to design a more effective and user-friendly tool. Her first model was created in Albany, New York.

Since its creation, the band saw has proven itself as a remarkably versatile and efficient tool. It is used extensively in various industries including woodworking, stone cutting, metalworking, food processing, and more. The band saw is especially favored in metalworking, manufacturing, and metal fabrication, where it cuts through materials of varying hardness with speed and precision.

One of the standout features of the band saw is its ability to cut through thick and tough materials without difficulty. The quality of the cuts is exceptional—smooth, clean, and precise—without any burrs, burning, or heat distortion. Moreover, using a band saw for metal cutting is considered highly cost-effective, as the machine uses minimal energy and does not require gas like some other cutting methods. Its simple design makes it easy to maintain and repair, while the machine’s low energy consumption and minimal operational issues make it a reliable and efficient choice. Additionally, the band saw requires little technical expertise to operate, reducing labor costs for businesses.

Modern band saws are equipped with advanced features like automatic feeding, automatic size measurement, speed adjustments for the blade, and variable speed controls, making the cutting process even easier and more efficient than ever before.

Katherine Burr Blodgett (1898-1979) was a pioneering woman in many fields. She became the first female scientist hired by the General Electric Research Laboratory in Schenectady, New York, in 1917, and the first woman to earn a Ph.D. in Physics from Cambridge University in 1926. Blodgett was also the first woman to receive the American Photographic Society's award and was honored by the American Chemical Society with the P. Garvin Francis Medal. Her most notable invention was the creation of non-reflective glass. Through her research on monomolecular coatings with Langmuir, Blodgett developed a groundbreaking method for applying thin layers of glass and metal. These natural thin films reduced glare on reflective surfaces, and once a certain thickness was reached, they completely eliminated reflections, resulting in the world's first 100% transparent glass. Blodgett's invention has since been used in various applications, including reducing distortion in eyeglass lenses, microscopes, telescopes, cameras, and projectors.

Katharine Blodgett earned her master's degree from the University of Chicago in 1918. She went on to become the first female scientist at General Electric’s research lab and was awarded a Ph.D. in Physics in 1926. During her five years at General Electric, she developed a method to create transparent glass that allowed 99% of light to pass through. This glass was first used in Hollywood films in 1939, where it immediately proved its significance. Over time, scientists refined her method, and today Blodgett's transparent glass is widely used in telescopes, camera lenses, car windows, eyeglasses, and picture frames.

Beer is actually a drink that has long been enjoyed by women. According to beer researcher Jane Peyton, ancient Mesopotamian women were the first to invent, sell, and even drink beer. While it's difficult to pinpoint exactly who invented it thousands of years ago, it's clear that women all over the ancient world were fond of this beverage. So, the next time you raise a glass, remember the goddess of the Sumerians who brewed and discovered beer. Beer has traditionally been seen as a drink for men, but what if the creators of this drink were women? In ancient Egypt over 5,000 years ago, beer was part of the daily diet. It was made from roasted barley bread and was also used in religious ceremonies.

The role of beer in ancient Egyptian society was significant; it was not just a drink. Beer was commonly used to treat various ailments, and it was also considered the perfect gift for the Pharaohs and an offering to the gods. Historical evidence shows that the Egyptians taught the Greeks how to brew beer. Greek writer Sophocles (450 BC) discussed moderation in beer consumption, and he believed the best diet for Greeks included bread, meat, vegetables, and beer. Beer production surged as Christianity spread, mainly because monks also brewed beer. Monasteries were the first commercial breweries, and the monks created breweries to provide food, shelter, and drink for pilgrims.

Just like in ancient times, women continued to be the primary brewers in the Middle Ages. According to historical research by Jane Peyton, ancient Mesopotamian women were the first to invent, sell, and drink beer. While the exact inventor remains unknown, Jane Peyton is credited as the first woman to run a brewery.

Melitta Bentz was a housewife in Dresden, Germany, who invented the first coffee filter. At the time, she was looking for a way to brew the perfect cup of coffee without the bitter taste. Melitta decided to create a method to filter coffee by pouring hot water over ground coffee and obtaining a liquid that had been filtered of the grounds. She experimented with various materials before discovering that the blotting paper used by her son at school worked the best.

She cut a piece of blotting paper into a circle and placed it inside a metal cup. The coffee filter and the paper filter were patented in 1908. Thanks to her invention, people could enjoy a cup of filtered coffee, significantly enhancing the flavor.

In December of that year, Melitta and her husband Hugo founded the company Melitta Bentz. The following year, they sold 1,200 coffee filter sets. In 1937, Melitta Bentz received a patent for her coffee filter bag and, in 1962, for her vacuum packing machine invention.

In the 1950s in the United States, typewriters were the go-to tool for drafting documents. These machines were easy to manufacture, simple to use, and became widely popular. However, if you made a mistake while typing, you had to start over from scratch. One fateful day in 1951, Bette Nesmith Graham, an executive secretary at Texas Bank and the mother of Mike, a famous singer from The Monkees band, discovered a way to fix typing errors. Observing that artists could correct their mistakes while painting on canvas, she wondered why typists couldn't do the same. She decided to use watercolor paint, which matched the color of the paper she brought to the office, to cover up errors, all without her boss noticing.

Graham then placed the solution into a green bottle and labeled it 'Mistake Out.' Soon, her coworkers were asking for a bottle of the magical correction fluid. In 1956, she decided to start her own company called Mistake Out (later renamed Liquid Paper) in North Dallas, and the business quickly took off. Using the same concept, Bette Nesmith Graham developed a liquid that worked like paint to correct typing mistakes. Initially, she used a blender to mix a suitable solution of paint and glue that would dry quickly when applied to paper, allowing the typist to continue typing over it. In 1958, this invention was patented under the name 'Liquid Water.' Not long after, the first eraser product, Mistake Out, was created, later renamed Liquid Paper. From an initial 100 bottles, by 1979, Liquid Paper was producing 25 million bottles annually. This was the world's first eraser, and it became the product that made Graham's company a huge success. In 1979, she sold the patent to Gillette for a staggering $47.5 million. Thanks to its practicality, this product became widely used and was welcomed everywhere.

Before 1968, envelopes were commonly used to carry items. However, their small size was a significant drawback. In 1870, Margaret Knight, a textile worker, came up with the idea for a paper bag with a square bottom. She also invented a machine that could cut, fold, and create the square base for the bag. This design allowed the weight of the contents to be distributed evenly across the bottom of the bag, making it more durable and capable of holding more items. Unfortunately, Margaret discovered that Charles Annan had stolen her idea, but she had enough evidence to defend her invention. Using sketches and notes, she proved that the invention was hers and ultimately won the legal battle to secure the patent for her design.

Margaret Knight received her patent for the square-bottomed paper bag machine in 1871 after a prolonged legal dispute with a group of machinists. Charles Annan, who had tried to steal her idea, believed that such a brilliant invention could not possibly come from a woman. However, history would later vindicate Margaret Knight, who was indeed a highly talented inventor. At just 12 years old, she had already invented a safety device for cotton mills, which is still in use today.

In 1949, homemaker Marion Donovan crafted the first disposable diaper by stitching a nylon shower curtain and fabric together, creating a way to contain the 'mess' of babies. Initially, her invention was rejected by the market, but her brilliant idea would later inspire modern diaper designs. That same year, she succeeded in introducing a waterproof lining for diapers to the prestigious Saks Fifth Avenue department store, where salespeople quickly recognized its potential. By 1951, Marion had secured four patents for her invention.

Marion Donovan's philosophy was to continuously improve even the smallest aspects of life to make it more convenient. In 1961, the first fully disposable diaper was introduced by Procter & Gamble in the U.S. The company had acquired Charmin Paper in 1957 and assigned one of their chemical engineers, Victor Mills (1897-1997), to focus on developing new products. However, the true origin of this invention lies with Marion Donovan.

She also started her own small business to market her invention, but it initially struggled to gain acceptance. Undeterred, she improved the design to make it leak-proof and continued to sell her products at Saks Fifth Avenue. Eventually, she sold her invention to the Keko Corporation for 1 million USD.