When were tasers invented?

Answer Scientist Jack Cover developed the Taser in 1974. The Taser, short for Thomas A. Swift's Electric Rifle, was available to the public in 1976. Cover was previously associated with the Apollo Moon La... Read More »

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When were cell phones invented&who were they made by?

Martin Cooper invented the cell phone in 1973, and Motorola was its maker. The phone was much bigger and heavier than today's models. Called the DynaTAC, the phone did not go one sale until 10 year... Read More »

When were Snickers invented?

The Snicker brand candy bar was invented by Frank Mars in 1930. Mars, the founder of Mars confections added peanuts to an existing nougat, chocolate and caramel treat to create the now famous Snick... Read More »

When were trolleys invented?

The electric railway trolley was patented Sept. 19, 1893, by an African-American inventor named Elbert R. Robinson. Robinson is also credited with acquiring a patent for another invention pertainin... Read More »

When were photocopiers invented?

The photocopier was invented in 1938 and the first machine was known as the "10-22-38 Astoria." This machine was invented by Chester Carlson when he invented the process known as electrophotograph... Read More »