Lonnie Johnson, a NASA engineer, invented the Super Soaker by accident - a burst of water shot across his bathroom during a heat pump experiment. The toy went on to sell nearly $1 billion. When Johnson discovered Hasbro had underpaid his royalties for years, he took them to arbitration and won $72.9 million.

The NASA Engineer Who Won $72.9 Million From Hasbro

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In 1982, Lonnie Johnson was at home in his bathroom, tinkering with a new kind of heat pump. His design used water instead of freon as a cooling fluid. When he connected a nozzle to a faucet and turned on the tap, a powerful stream shot across the room and hit the opposite wall. He looked at it and thought: that would make a great squirt gun.

From the Air Force to NASA to a Toy Store

Johnson grew up in Mobile, Alabama, and built his first robot from scrap metal as a teenager. He earned a master's degree in nuclear engineering, then joined the U.S. Air Force, where he worked on the stealth bomber program. He later moved to NASA's Jet Propulsion Laboratory, contributing to the Galileo mission to Jupiter.

But the bathroom experiment stayed with him. By 1989, Johnson had refined the pressurized water gun into a product called the Power Drencher. Larami Corporation licensed it, renamed it the Super Soaker, and put it on shelves in 1990. Within two years it was the best-selling toy in the United States, generating $200 million in sales in 1991 alone.

$1 Billion Sold - and a Shortfall in Royalties

Hasbro eventually acquired Larami, and the Super Soaker line kept growing. Total sales approached $1 billion. Under his licensing agreement, Johnson was entitled to royalties on every unit sold. But in 2013, after reviewing Hasbro's records, Johnson discovered the company had been underpaying him on both Super Soaker and Nerf products from 2007 to 2012.

He filed for arbitration in February 2013. The arbitrator reviewed the full record and ruled entirely in Johnson's favor on every point. In November 2013, Hasbro was ordered to pay $72.9 million in unpaid royalties. His attorney summed it up: "We got everything we asked for."

Still Building

Johnson has never stopped inventing. He holds over 250 patents. His current project - the Johnson Thermoelectric Energy Converter - aims to turn heat directly into electricity with no moving parts. The man who accidentally invented a billion-dollar toy is now working on clean energy technology that could power the future.

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Frequently Asked Questions

Who invented the Super Soaker?
Lonnie Johnson, a nuclear engineer and former NASA scientist, invented the Super Soaker in 1982. He was testing a heat pump experiment in his bathroom when a powerful stream of water shot across the room, sparking the idea for a pressurized water gun.
How much money did Lonnie Johnson win from Hasbro?
Johnson won $72.9 million in a 2013 arbitration against Hasbro for unpaid royalties covering the years 2007 to 2012. The arbitrator ruled entirely in his favor on every point, awarding him the full amount he had claimed.
Why did Lonnie Johnson take Hasbro to arbitration?
Johnson discovered that Hasbro had been underpaying royalties owed to him under their licensing agreement, covering Super Soaker and Nerf products from 2007 to 2012. He filed for arbitration in February 2013, and the arbitrator ruled entirely in his favor, awarding $72.9 million in November 2013.
What did Lonnie Johnson do at NASA?
Johnson worked at NASA's Jet Propulsion Laboratory, contributing to the Galileo spacecraft mission to Jupiter. Before that, he served in the U.S. Air Force and worked on the stealth bomber program. He holds a master's degree in nuclear engineering from Tuskegee University.
What is Lonnie Johnson working on now?
Johnson is developing the Johnson Thermoelectric Energy Converter, a solid-state device designed to convert heat directly into electricity with no moving parts. If successful, it could have major applications in solar energy and waste-heat recovery.

Verified Fact

Verified Jun 7, 2026 · 6 sources checked

Source: Wikipedia
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Claims checked

  • Accidental invention via heat pump experiment 1982
  • NASA/JPL engineer, Galileo mission
  • Power Drencher licensed to Larami 1989, renamed Super Soaker 1990
  • 00 million in sales in 1991 alone
  • Best-selling toy
  • Total sales nearly billion
  • Royalty underpayment period 2007-2012 covering Super Soaker and Nerf
  • Filed arbitration February 2013
  • 2.9 million awarded November 2013
  • Attorney quote ('got everything we asked for', 'ruling was total')
  • Master's degree in nuclear engineering, Tuskegee
  • Over 250 patents

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