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Inventions

Inventions
What Benjamin Franklin invented?

Bifocal spectacles
Hygrometer
Radio
Barometer

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Inventions
What Elisha Otis invented?

Hydraulic Crane
Turbine
The brake used in modern elevators
Jet Engine

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Inventions
Who invented Dynamite?

Benjamin Franklin
Alfred B. Nobel
Sir Alexander Graham Bell
Thomas Alva Edison

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Inventions
What toy was invented by Joshua Lionel Cowen around 1900?

Raggedy Ann doll
Tinkertoys
Yo-yo
Electric train

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Inventions
For what does the world owe Almon Strowger a debt of gratitude?

Traffic Lights
Parking Meters
Automatic Telephone Exchanges
Vending Machines

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Inventions
When was barb wire patented?

1895
1874
1840
1900

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