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Inventors & inventions Jeopardy Words Answers
Martha coston invented the coston this a device for signaling at sea in the 1850s
Inventors & inventions
• Level
665
In 1938 chemist roy plunkett invented polytetra-fluoroethylene a nonstick substance better known as this
Inventors & inventions
• Level
678
The cabin of this inventor of the cherokee syllabary is a national historic landmark in oklahoma
Inventors & inventions
• Level
2523
