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When is National Inventors' Day in the USA? - search

Who, in 1879, invented the light bulb? - search

When died the inventor of the revolver, Samuel Colt? - search

Who has invented the knitting machine in 1589? - search

In which year and by who was the telephone invented? - search

Who invented the World Wide Web (www)? - search

What is the oldest known date of which scientists are sure that a compass is made/used? - search

What happened in 1948? - search

In what year was the barometer invented? - search

In what year was the radio invented? - search

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