A patent was granted to Robert Goddard for a liquid-filled rocket.
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The Soviet Union started mass producing the AK-47 assault rifle.
A team of scientists invented the sports drink Gatorade in a University of Florida lab.
Inventor Leo Baekeland patented the first thermosetting plastic, Bakelite, which sparked the birth of the plastics industry.
Thomas Edison received a patent for his new invention, the phonograph.
Inventor Richard Rhodes received the patent for a hearing aid.
