2012
Coins are not "invented", they're designed. The first circulating cents were designed by the US Mint's Chief Coiner Henry Voight.
If you mean what was the FIRST year, the first US cents (and half-cents) were struck in 1793 at the Philadelphia Mint. But they really weren't "invented" because that word usually refers to developing a machine or technology. Although it was one of the first (or THE first) decimal coin minted, the US cent was in part derived from the British penny which at that time had been struck in various forms for almost 800 years.
who invented the first steamboatRobert Fulton invented the clermont and sailed it on the Hudson river.
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1776
The refrigerator was invented by John Gorrie.
thomas Moore invented the fridge freezer and refrigerator
A Refrigerator
The first really successful refrigerator car is said to have been invented by Joel Tiffany. He received a US patent for it in 1877.
see History.com -- history of the refrigerator
The refrigerator was first demonstrated in 1748, but it was made reality by Jacob Perkins in 1834.1911
The first refrigerator was built in 1748 by William Cullen.
In the yr 1876.reigerator was invented by carl paul gottfried von linde.bt there practicle use in homes starts from 1911.....
The refrigerator was invented by Oliver Evans in 1805. He designed the first refrigeration machine that used vapor instead of liquid to cool.
Oliver Evans invented the first refrigerator in 1805.
Carl von Linde invented the first methyl ether refrigerator in 1874. In 1876, he developed an ammonia refrigerator. Linde was a German engineer who was born in 1842 and died in 1934.
The domestic refrigerator was invented in Fort Wayne, Indiana. The refrigerator was invented by Fred W. Wolf in 1913.