invention articles - Page: 11
Who invented the lock mechanism?
When did mercury vapor lamps come out?
When were fuel gauges invented?
Who invented indexed shifting?
Did a black man invent the door knob?
Who invented the gramophone which replaced the cylinder on the phonograph with flat discs?
Who invented the manual calculator?
Who invented the automatic traffic light?
What is the most efficient steam engine?
What was used to spin cotton in earlier times?
Who invented the car silencer?
Who invented the fiber laser?
What was the early multiple spindle machine for spinning wool or cotton?
What machine was used for cotton?
What was the most popular brand of typewriter?
When did guitar pedals get invented?
What is Lonnie's billion dollar invention?
What were Alexander Graham Bell's goals?
What did Thomas Edison first make his impact on culture and society?
How were wax cylinders recorded?
Who invented the wax cylinder?
Who was nicknamed The Sun Queen after she invented a solar-powered water desalination machine during World War II?
When did the first traffic lights appear?
