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1920s
Garrett Morgan is credited with inventing the first automatic traffic light that uses electricity in 1923. Although there were other traffic lights, his has a t-shaped pole and has 3 positions. -
1930s
The first car radio was invented by William Lear, a radio parts owner and Elmer Wavering.they teamed up with 2 brothers and put it in there cars that they make. -
1940s
In 1944 the kidney dialysis machine by Willem kolff. -
1950s
In 1951 the first tape recorder was invented by Charles Ginsburg, who led the team that developed it to go at a much slower rate because the recording heads rotated at high speed. -
1960s
The LASER in 1960 invented by Theodore Maiman. It is now used to read blue-ray. -
1970s
the home vcr was invented in 1970 by chariles ginsburg. They were more durable than reels. -
1980s
The internet was invented in 1982 by vinton cerf and bob kahn.
Alec jerfferys invented the DNA fingerprinting in 1985 and is very useful for finding out who the criminal was. -
1990s
in 1994 yahoo was founded by jerry yang and david filo. -
2000s
the playstation 2 was invented in 2000 by sony corporation. -
2010s
the smart board 800 was invented by david martin in 2010.