Inventions That Shook The World

“The 1930's”

Though overshadowed by the Great Depression, there is no shortage of ingenuity in the 1930s. The two-way radio gets miniaturized and the world's first portable walkie talkie goes on the air. The electric guitar changes popular music forever, and commuters become a cash cow for cities when the Parking Meter is introduced. Meanwhile, the helicopter makes its debut. (4 of 10)

10.1 and 36.2