The History of Seatbelts: The Patent-Free Invention That Saved a Million Lives

On February 10, 1885, a man named Edward J. Claghorn of Fordham, New York, received patent number 312,085 from the United States Patent Office.^[1] It was called a “Safety-Belt.” But this patent had nothing to do with automobiles — Karl Benz wouldn’t receive his patent for the first automobile until the following year, 1886, meaning the seatbelt actually predates the car. Claghorn’s invention was a kind of harness designed to keep New York carriage passengers in their seats, and it bore little resemblance to what we know today. But the core idea — that people in a moving vehicle should be secured — started here.

It would take nearly a century for that simple idea to become standard equipment in every automobile. Along the way, the story involves a Swedish engineer’s breakthrough design, an unprecedented corporate decision to give away a patent for free, and fierce public resistance from citizens who called it a law that robbed them of their freedom.

From the Sky to the Road: The Seatbelt’s First Life

The seatbelt saw its first practical use not in automobiles, but in the air. In March 1910, U.S. Army Air Corps pilot Benjamin Foulois attached a four-foot leather strap to the Wright Military Flyer — a plane built by the Wright brothers — after nearly being thrown from his seat by turbulence.^[2] By 1926, the Air Commerce Act required seatbelts on passenger aircraft, and the requirement was extended to all aircraft in 1928.^[3]

The automotive industry’s response, by contrast, was sluggish. In 1949, Nash Motors became the first American automaker to offer seatbelts as an option on a production car — but of the 40,000 belts prepared, only around 1,000 customers actually requested them.^[4] In 1956, Ford launched its “Lifeguard Design” campaign under Vice President Robert McNamara, offering seatbelts as a $9 option under the slogan “Ford '56 is the safe buy.” Yet only 2 percent of buyers chose them.^[4] The industry took this failure as evidence for what became a standing axiom: “Safety doesn’t sell.”

The belts installed in cars at the time were two-point lap belts — a strap that crossed the abdomen. In a high-speed collision, they caused the upper body to jackknife forward, often resulting in serious internal injuries. The safety device was creating the very harm it was meant to prevent.

An Ejection Seat Engineer Meets the Automobile

In 1958, Volvo president Gunnar Engellau had an urgent personal motivation: a relative had died in a traffic accident. The diagonal lap belt fitted to the car had failed to absorb the impact of the crash. Engellau set out to find someone who could build something better.^[5]

The man he recruited came from an unlikely background — aviation. Nils Bohlin (1920–2002) had spent years at Swedish aircraft manufacturer SAAB designing ejection seats and rescue systems for fighter pilots.^[5] The expertise he brought — understanding how to manage the extreme forces exerted on the human body — was exactly what Engellau needed.

As Volvo’s first Chief Safety Engineer, Bohlin spent roughly a year developing a design that addressed the fundamental shortcomings of the two-point belt. The concept was simple but revolutionary. He combined a diagonal shoulder strap running across the chest with a lap strap across the pelvis, with both straps meeting at a single anchor point low on the side of the hip. This V-shaped configuration distributed crash energy across two of the body’s strongest skeletal structures — the sternum and the pelvis.^[6] Crucially, the buckle could be fastened with one hand.

On August 13, 1959, the first production car in the world to come equipped with a three-point seatbelt as standard — the Volvo PV544 — was delivered to a dealer in Kristianstad, Sweden.^[6] Together with the Volvo Amazon (120 Series), these vehicles permanently altered the trajectory of automotive safety.

Giving the Patent to the World

Bohlin filed for a U.S. patent on August 17, 1959, and patent number 3,043,625 was granted on July 10, 1962.^[5] Volvo then made an unprecedented decision: rather than holding the patent exclusively, the company made it freely available to every automaker in the world.^[6]

The economic weight of that decision is difficult to overstate. Because this design was adopted in virtually every car produced after the 1960s, Volvo could have collected royalties on a staggering scale. Instead, the company held firm to the position that “this invention has more value as a life-saving tool than as a money-making tool.”^[6] Bohlin himself traveled the world to promote its adoption.

Germany’s patent office later named eight patents from 1885 to 1985 that had the greatest impact on humanity. Bohlin’s three-point seatbelt was listed alongside Karl Benz’s automobile, Thomas Edison’s light bulb, and Rudolf Diesel’s engine.^[5]

Unsafe at Any Speed

Six years after the three-point belt reached the market, a single book shook the entire American automobile industry. On November 30, 1965, 31-year-old attorney Ralph Nader published Unsafe at Any Speed.^[7]

Nader argued that traffic fatalities were caused not primarily by driver error, but by design flaws that automakers had deliberately overlooked. He focused heavily on the rear suspension defects in General Motors’ Corvair, and indicted Detroit’s entire automotive establishment for prioritizing style over safety.^[7]

GM responded by hiring private detectives to investigate Nader’s personal life, and even attempted to entrap him using a honey trap. When these tactics were exposed at a Senate hearing, GM was forced to issue a public apology — and the scandal, paradoxically, catapulted Nader to national prominence.^[7] The book and the public pressure it generated led directly to President Lyndon Johnson signing the National Traffic and Motor Vehicle Safety Act on September 9, 1966.^[7] The act established the National Highway Traffic Safety Administration (NHTSA), and beginning January 1, 1968, all new cars sold in the United States were required to be equipped with seatbelts.

There was, however, an important distinction: what was mandated was the installation of seatbelts — not their use.

A Law That Steals Your Freedom

In the early 1980s, the seatbelt usage rate among American adults stood at just 14 percent.^[8] Belts had been fitted to every new car since 1968, but most drivers simply ignored them. Some cut them out entirely.

Changing that would require a law mandating use — and when such legislation appeared, it was met with fierce resistance. When Michigan state representative David Hollister introduced a seatbelt usage bill, he received threatening letters comparing him to Hitler.^[8] A legislative colleague called the bill “mass hysteria manufactured by the media” and warned that the government would next ban smoking.^[8]

At the heart of the opposition was personal freedom. The argument went: “Whether I wear a seatbelt is a matter of my own safety, not public safety. People must have the right to choose for themselves.” A 1989 editorial declared that “seatbelt laws rob us of our freedom.”^[8] In Wisconsin, a citizen group called “Seatbelt Freedom of Choice” organized systematic opposition, and some opponents argued the laws were unconstitutional under the Fourth, Fifth, Ninth, and Fourteenth Amendments.^[8]

Resistance took creative forms as well. T-shirts printed to look like a fastened seatbelt were sold as a workaround.^[8] An ignition interlock system introduced in 1974 — which prevented the car from starting unless the belt was buckled — triggered such explosive public backlash that it was repealed within a year.^[9]

The situation in Britain was not much different. Between 1973 and 1981, seatbelt legislation was introduced in Parliament ten times and defeated each time.^[10] Opponents consistently invoked paternalism — the argument that such laws infringed on personal liberty.

The Victorian Experiment

The first jurisdiction in the world to legally mandate seatbelt use was not in the United States or Europe — it was the state of Victoria, Australia. In 1970, Australia’s road toll reached a record 3,798 deaths.^[11] A convergence of factors — recommendations from a medical trauma committee, press campaigns, and a joint parliamentary committee — shifted the political climate rapidly.

On November 17, 1970, Victorian Chief Secretary Arthur Rylah announced the requirement, and the law took effect on December 22 — just before the Christmas holiday travel peak.^[11] The results were immediate. In the first year after the law took effect, road deaths in Victoria fell by approximately 13 percent. Other Australian states quickly followed, and on January 1, 1972, Australia became the first country in the world to mandate seatbelt use in both front and rear seats nationally.^[11] By 1977, the usage rate had reached 90 percent.

Victoria’s success sent ripples around the world. France mandated seatbelt use in 1973, Spain in 1974, Sweden and Norway in 1975, West Germany in 1976, and the United Kingdom in 1983.^[12] In the United States, New York became the first state to enforce a seatbelt usage law in December 1984, and 29 more states had followed by 1987.^[12]

The American path to mandated use, however, involved some behind-the-scenes maneuvering. In 1984, Secretary of Transportation Elizabeth Dole announced that automakers would be required to install passive restraints — such as airbags — in all cars by 1990, but offered to rescind that regulation if states representing two-thirds of the U.S. population passed seatbelt usage laws by April 1989.^[8] The sudden willingness of state legislatures to pass such laws owed much to this federal pressure.

To this day, New Hampshire remains the only U.S. state with no adult seatbelt usage mandate. True to its state motto — “Live Free or Die” — its usage rate is approximately 70 percent, well below the national average of 91 percent.^[9]

What the Numbers Say

According to the U.S. Centers for Disease Control and Prevention (CDC), seatbelts reduce the risk of death in a car crash by approximately 45 percent and the risk of serious injury by approximately 50 percent.^[13] NHTSA estimates that between 1975 and 2017, seatbelts saved the lives of 374,276 Americans, with roughly 15,000 lives saved each year.^[14]

The global scale is even larger. Volvo estimates that more than one million lives have been saved worldwide since the introduction of the three-point belt.^[6] Yet according to the World Health Organization (WHO), approximately 1.3 million people still die in road traffic crashes every year, with 93 percent of those deaths occurring in low- and middle-income countries.^[15] Globally, only about 44 percent of vehicle occupants in front seats wear a seatbelt, and just 15 percent of rear-seat passengers do.^[15]

An unbelted occupant is 30 times more likely to be ejected from the vehicle in a crash than a belted one, and 75 percent of those who are ejected die.^[13] Among all U.S. traffic fatalities in 2021, between 51 and 61 percent involved unbelted occupants.^[13]

An Evolving Invention

The core principles of Bohlin’s design have remained unchanged for more than six decades, but the technology has continued to advance. In 1981, the Mercedes-Benz S-Class (W126) became the first production car to feature a seatbelt pretensioner.^[16] The device uses a small pyrotechnic charge to detect a collision and, within milliseconds, eliminate all slack in the belt and lock the occupant firmly in place. By the mid-1990s, load limiters had been added: when tension in the shoulder belt exceeds a certain threshold, the belt pays out slightly to reduce the concentration of force on the chest.^[16] Together, pretensioners and load limiters have been shown to reduce the risk of fatal injury by an additional 13 percent.^[16]

In 2024, NHTSA finalized a rule requiring audible rear-seat seatbelt reminder systems in all new vehicles, taking effect in 2027.^[17] The European Union already mandates such reminders for both front and rear seats.

What a Surrendered Patent Left Behind

Nils Bohlin died on September 26, 2002, at the age of 82. On that same day, he was inducted into the National Inventors Hall of Fame.^[5] A remark he made during his lifetime is often quoted: designing an ejection seat meant thinking about the survival of one person; designing an automotive seatbelt meant thinking about the survival of everyone in the car.

What may be most remarkable about the history of the seatbelt is not the technology itself. It is the corporate decision to surrender a patent in the face of a life-saving invention, the decades of social resistance to that invention, and the way that resistance ultimately yielded to the weight of evidence. Today, when you reach across your shoulder and pull that belt almost without thinking, you are performing a gesture that carries within it a century of invention, argument, and hard-won compromise.