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Inventions

Inventions
When was the toothbrush invented?

1770
1765
1742
1790

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Inventions
Ralph Samuelson was only 18 when he invented this sporting item in 1922. What was that?

Motorboat
Golf tee
Hang glider
Water skis

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Inventions
In which decade were the first successful diode and triode vacuum tubes invented?

1890s
1880s
1800s
1900s

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Inventions
Who invented the BALLPOINT PEN?

Write Brothers
Biro Brothers
Bicc Brothers
Waterman Brothers

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

Parking Meters
Automatic Telephone Exchanges
Vending Machines
Traffic Lights

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Inventions
Which insurance salesman invented the fountain pen in 1884?

Sir William Grove
Charles Kettering
George Fountain
Lewis Edson Waterman

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