What Elisha Otis invented?
The brake used in modern elevators
Jet Engine
Turbine
Hydraulic Crane
Additional Questions
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For what does the world owe Almon Strowger a debt of gratitude? |
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Who is often called the first African-American inventor? |
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The first hand glider was designed by...? |
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In which decade was the telegraph invented? |
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What inspired reflecting road lights to be invented? |
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When were blue jeans invented? |
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What device for new parents did Ann Moore invent in 1969? |
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In which decade was the transistor invented? |
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