The helicopter was first invented on September 14, 1939. Although the flight only lasted a few seconds the impact it had on aviation was profound.
The photocopier was invented in the 1937 and made it possible to create hundreds of copies per minute instead of making them by hand.
The electric guitar was invented in 1937. This invention of the guitar revolutionized music and is still used in music today.
Lots of experimental telecasts with the radio and television began to take place in the early 1930s.Companies like CBS and NBC began competing with their telecasts.
Fun Fact: Most inventions that were made during this time period had to do with food. Examples: