This Woman’s Secret Invention Paved the Way for WiFi and GPS

The first patent ever issued in the world was in 1421 to ItalianRenaissance artist, architect, and engineer Filippo Brunelleschi. He received it for his creation of a barge with hoisting gear used to transport marble. It wasn't until almost 370 years later in 1790 that a patent was issued to an American – Samuel Hopkins – for his process of making an ingredient used in fertilization – potash. Yet, it took an additional 19 years before a woman was recognized for her contribution.

On May 5, 1809, Mary Kies became the first woman to receive a patent in the United States for her technique of weaving straw with silk (her process was adopted by the New England hat-making industry). Women inventors may have existed well before this time but property laws in many states made it illegal for women to own property on their own, which led some women to apply for patents in their husbands' names if they decided to apply at all.

Although women account for half of the doctoral degrees in science and engineering, as of 2022, only 10.9% of U.S. patent holders are women. This disparity is due in part to the U.S. Patent and Trademark Office being more likely to reject patents with women as sole applicants. Furthermore, when patents sought by women are approved, they are more likely to have added parameters that make the description of the patents far more detailed. These revisions tend to lower the scope of the patent, making it weaker and less valuable.

As a result of gender bias, unequal pay, and limited advancement opportunities, women face more scrutiny in several fields, most especially in the area of STEM, fields that are known to be male-dominated. This is all the more reason why the women listed here have more to be congratulated on than their inventions. They are pioneers in their fields and have often overcome tougher hurdles based on their sex than their male counterparts. (The same is true for many women athletes, who are often more impressive than many men in the same field, like Sha'Carri Richardson who just ran her best time at the U.S. Olympic Trials.)

To compile a list of remarkable inventions you didn't know women created, 24/7 Tempo reviewed over a dozen news reports and historical articles on inventions, both by men and women, that changed history. These are the most influential women in science.

Here are remarkable inventions you didn't know women created.

• Invented by: Tabitha Babbitt
• Year/period: 1812

While living in a Shaker community and working as a weaver, Babbitt watched people struggling to cut wood with a pit saw, which required two users and only cut in one direction. Determined to help, she attached a circular blade to her spinning wheel and invented the much more efficient circular saw.

• Invented by: Jeanne Villepreux-Power
• Year/period: 1832

A French naturalist, Villepreux-Power was trying to prove that the paper nautilus does not take discarded shells from other organisms, but rather grows its own shell. To observe the creature for an extended period and to study marine life, she invented a glass aquarium.

• Invented by: Nancy Johnson
• Date of origin: 1843

Johnson had her priorities straight before freezers were even invented. She created a double-cylinder hand-crank ice cream machine. It could create two flavors that are frozen at the same time but separately.

• Invented by: Ada Lovelace
• Date of origin: 1843

While translating the notes of mathematics professor Charles Babbage for his theoretical invention of the analytical engine, Lovelace added her own notes, tripling the original text, and is credited with writing the world's first computer algorithm.

• Invented by: Sarah Mather
• Date of origin: 1845

Mather's 1845 patent was for her "submarine telescope," an apparatus with a lamp that was attached to a tube, which was then sunk underwater. It was used not by underwater vessels, but by people above water attempting to see into the depths to investigate wrecks, damaged ship hulls, and enemy activity during the Civil War.

• Invented by: Margaret Knight
• Date of origin: 1871

After having her invention stolen by a man who claimed that there was no way a woman could have invented such a thing, Knight finally received a patent in 1871 for a machine that could produce square-bottomed paper bags.

• Invented by: Josephine Cochran
• Date of origin: 1872

Though other prototypes existed, it took a woman's common sense to create a dishwasher that actually cleaned the dishes. Cochran's design was the first that used water pressure rather than scrubbers to remove debris.

• Invented by: Ellen Fitz
• Date of origin: 1875

Fitz was a tutor in Canada when she designed a globe mount that could display the earth's daily rotation in relation to the path of the sun not only by day and night but also throughout the year.

• Invented by: Mary Walton
• Date of origin: 1879

Passionate about improving urban conditions and air pollution, Walton invented a train chimney system that reduced air pollution by filtering smoke through water, trapping the airborne chemicals, and holding them in suspension.

• Invented by: Mary Walton
• Date of origin: 1881

In addition to the pollution-minimizing locomotive chimney, Walton also patented a way to greatly reduce the noise of New York City's elevated railways by insulating the tracks with boxes of sand. The city's Metropolitan Railroad bought the rights almost immediately.

• Invented by: Adeline D. T. Whitney
• Date of origin: 1882

Whitney, the author of many books for people young and old, patented an early version of alphabet blocks that came in various shapes and sizes and could form letters, numbers, and punctuation symbols.

• Invented by: Maria Beasley
• Date of origin: 1882

Though Beasley had already made a fortune on a barrel-hooping machine patent, this serial inventor went on to design an improved life raft with guard rails that was fireproof and foldable for easy storage. Her life rafts were used on the Titanic and saved over 700 lives.

• Invented by: Anna Connelly
• Date of origin: 1887

Tenement fires were much more deadly before Connelly invented an external metal staircase, the very first fire escape. In addition to saving lives, her invention also precipitated one of the first New York City building codes, which required residential buildings to have a secondary means of escape for emergencies.

• Invented by: Sarah Boone
• Date of origin: 1892

Though patents for folding ironing boards appeared in the 1860s, Boone's ironing board featured a key difference: It had a narrow, double-sided arm that made it perfect for ironing sleeves without forming creases.

• Invented by: Margaret A. Wilcox
• Date of origin: 1893

Taking advantage of the heat already generated as a byproduct of combustion, Wilcox invented a way to heat cars by channeling air over the engine and into the cab.

• Invented by: Letitia Geer
• Date of origin: 1899

For centuries before Greer invented a one-handed syringe, medical professionals had been using syringes that required both hands to administer injections.

• Invented by: Florence Parpart
• Date of origin: 1900

Parpart's street sweeper design was not the first, but it was such an improvement on earlier models that within two years of receiving her patent she had contracts all across the United States to manufacture her design.

• Invented by: Mary Anderson
• Date of origin: 1903

After receiving a patent in 1903, Anderson tried to sell her new windshield cleaning device to a manufacturer, who refused, stating that her invention lacked practical value. Her windshield wipers failed to take off before her patent expired and it was 10 years before a similar device became standard on cars.

• Invented by: Elizabeth Magie
• Date of origin: 1904

Originally designed to demonstrate the evils of unchecked capitalism, Magie's "The Landlord's Game," was patented in 1904, 30 years before a man patented a very similar game called Monopoly and sold it to Parker Brothers.

• Invented by: Mary A. Delaney
• Date of origin: 1908

In Delaney's words, her invention of a leash you could shorten at a moment's notice was to prevent dogs from "running on the wrong side of lamp posts or pedestrians, thus causing much annoyance to the owner." Thank you, Mary.

• Invented by: Melitta Benz
• Date of origin: 1908

Pour-over coffee fans may be surprised to learn that the company Melitta isn't named after an Italian coffee maker. It's named after Melitta Bentz, a German entrepreneur who invented an easy, minimalist way to make coffee by placing it in a filter and pouring water over it.

• Invented by: Florence Parpart
• Date of origin: 1914

In a time when people were still using ice boxes, Parpart patented an electric refrigerator that she successfully marketed and improved upon for years.

• Invented by: Ida Forbes
• Date of origin: 1917

Not much is known about Ida Forbes besides that she patented the first electric hot water heater at a time when most hot water heaters ran on gas.

• Invented by: El Dorado Jones
• Date of origin: 1917

Nicknamed "Iron Woman," El Dorado Jones owned her own metalworking factory where she employed only women over 40. Though she never received the funding to manufacture it, she invented the airplane engine muffler.

• Invented by: Alice Parker
• Date of origin: 1919

Parker's revolutionary design for central heating, though never utilized, was the first that used natural gas, rather than wood, to heat a home.

• Invented by: Lillian Gilbreth
• Year/period: 1920s

Gilbreth, an engineer, and psychologist, performed exhaustive research on the psychological impact that work spaces have on productivity. Her genius in the area of ergonomics brought us many valuable inventions, including the foot pedal trash can.

• Invented by: Ida Hyde
• Date of origin: 1921

The first female researcher at Harvard Medical School, Hyde created one of the earliest models of an intracellular micropipette electrode, which allowed her to stimulate and monitor a cell without disturbing the cell wall. This technology is still widely used in science laboratories.

• Invented by: Katharine Blodgett
• Date of origin: 1935

Before Blodgett's revolutionary non-reflective glass coating was invented, glass wasn't nearly as useful or reliable as it is today. Her invention has proven indispensable in the making of camera lenses, microscopes, and eyeglasses.

• Invented by: Hedy Lamarr
• Date of origin: 1941

During World War II, Lamarr, who also happened to be a movie star, created a frequency-hopping communication system that could guide torpedos without being detected. Her groundbreaking work paved the way for the modern invention of WiFi, GPS, and Bluetooth.

• Invented by: Maria Telkes
• Date of origin: 1947

A pioneer in the field of solar thermal storage systems, MIT researcher Maria Telkes created the first solar-heated system for her home in Dover, Massachusetts.

• Invented by: Marion Donovan
• Date of origin: 1950

First inventing a leak-proof diaper covering, then a fully disposable diaper, Donovan was intent on helping as many people as possible with her ingenuity. While it's not surprising that her inventions were completely ignored as "unnecessary and impractical" by the male manufacturers she pitched them to, Donovan took matters into her own hands and sold them straight to Saks Fifth Avenue.

• Invented by: Rachel Fuller Brown and Elizabeth Lee Hazen
• Date of origin: 1950

These two New York Department of Health lab researchers discovered Nystatin, one of the first effective anti-fungal medicines, by collaborating on experiments through the mail.

• Invented by: Bette Nesmith Graham
• Date of origin: 1951

This invention turned Graham from a secretary to a millionaire. First marketed as "Mistake-Out," Graham's homemade typewriter correction fluid was an instant hit among her fellow secretaries. After further experimentation, she perfected her recipe and Liquid Paper was born.

• Invented by: Grace Murray Hopper
• Date of origin: 1952

A computer scientist who helped design Harvard's Mark I Computer, Hopper also invented a compiler that could translate written language into computer code and was a part of the team that developed COBOL, one of the first modern computer programming languages.

• Invented by: Patsy O'Connell Sherman
• Date of origin: 1956

While attempting to develop a new kind of rubber for jet fuel lines, Sherman and her lab partner Sam Smith accidentally discovered a waterproof, stain-proof, insoluble polymer that eventually became Scotchgard. Besides leather, it can be used on fabrics and carpets.

• Invented by: Mary Sherman Morgan
• Date of origin: 1957

Explorer I, the first satellite ever launched into orbit by the United States, owed its success to Hydyne, the improved rocket fuel that Morgan created during her time as technical lead at North American Aviation's Rocketdyne Division.

• Invented by: Gertrude Belle Elion
• Date of origin: 1957

During her long career as a pharmacologist, Elion helped develop countless drugs that are used in the treatment of AIDS, malaria, herpes, and cancer. Along with George Herbert Hitchings, she invented the first immunosuppressive drug, Azathioprine, which was initially used for chemotherapy patients, and eventually for organ transplants.

• Invented by: Stephanie Kwolek
• Date of origin: 1966

While searching for strong but lightweight plastics to use in car tires, DuPont researcher Stephanie Kwolek discovered what would become known as Kevlar. This revolutionary fiber has saved countless lives in the form of bullet-proof vests and is also used in numerous applications, such as bridge cables, canoes, and frying pans.

• Invented by: Yvonne Brill
• Date of origin: 1974

Brill's groundbreaking invention, the hydrazine resistojet, streamlined various rocket propulsion systems, which all required different types of fuel and added prohibitive weight, into a lighter system with a single fuel source. Monopropellant thrusters are now standard and are why we have self-propelling satellites.

• Invented by: Erna Schneider Hoover
• Date of origin: 1967

Before Hoover invented a telephone call traffic system, phone circuit equipment at Bell Labs — where she was a researcher — was constantly overloaded. Her computerized solution monitored call volumes and adjusted acceptance rates accordingly, so as not to overload circuits.

• Invented by: Marie Van Brittan Brown
• Date of origin: 1969

With New York City police being notoriously slow to respond to calls in her neighborhood, Brown took matters into her own hands and created a home security system with closed-circuit television.

• Invented by: Shirley Ann Jackson
• Date of origin: 1970's

Shirley Ann Jackson was an award-winning theoretical physicist. Her contributions to the field of telecommunications led to the invention of numerous technologies, including caller ID and call-waiting, as well as solar cells and fiber optic cables.

• Invented by: Evelyn Berezin
• Date of origin: 1971

In addition to creating the first computerized airline booking system, Berezin created the world's first word processor. She realized that because of her gender, she wouldn't be able to move up in the industry, so she also founded her own company, Redactron, to get her inventions on the market.

• Invented by: Barbara Askins
• Date of origin: 1978

While working for NASA, Askins was tasked with finding a way to improve the quality of photos taken from space. Her method of enhancing photo negatives was far more widely applicable, as it could be used to clarify photos after they were already developed. Her technology has been adapted for use with X-rays and historical photo restoration.

• Invented by: Olga Gonzalez-Sanabria
• Date of origin: 1980

The International Space Station relies on solar power, but for a third of its rotation, the earth blocks the sun's rays. Gonzalez-Sanabria's long-life nickel-hydrogen batteries keep the International Space Station powered up during that dark portion of its rotation.

• Invented by: Rachel Zimmerman
• Date of origin: 1984

At only 12 years old, Zimmerman invented software that allows people with speech disabilities to communicate non-verbally by using symbols on a touchpad that are then translated into written language.

• Invented by: Patricia Bath
• Date of origin: 1986

Bath's patented Laserphaco Probe allows doctors to dissolve cataracts quickly and painlessly before applying new lenses to patients' eyes. This technology is used worldwide to prevent blindness due to cataracts.

• Invented by: Temple Grandin
• Date of origin: 1990

Grandin's innovative designs in the field of animal husbandry have led to calmer livestock and fewer injuries. She has developed numerous ways to handle cattle based on how they naturally behave, rather than on brute force. Her center-track cattle restraint system is now used to manage about half of the cattle in the United States.

• Invented by: Ann Tsukamoto
• Date of origin: 1991

A vital breakthrough in cancer research, Tsukamoto's co-patented process of isolating human stem cells found in bone marrow has saved hundreds of thousands of lives.

• Invented by: Sally Fox
• Date of origin: 1997

Before Fox's innovative plant-breeding work, naturally colored pieces of cotton were rare, temperamental, and could only be picked and spun by hand. Her work has led to cotton that grows in an array of colors and that can be machine-harvested and spun, allowing for a drastic reduction in chemical and bleach processing, and the need for synthetic dyes.