What is "developed in the 1930s?

"Developed in the 1930s" generally refers to products, technologies or ideas which were created or introduced during the decade of 1930. Some examples of significant developments from this era include:

• Nylon: Developed by DuPont in 1935, nylon was the world's first synthetic fiber and quickly replaced silk in materials such as stockings and parachutes.
• Television: Although invented in the late 1800s, television did not become popular until the 1930s when the first electronic television sets were being produced. The BBC began regular broadcasts in 1936.
• Polaroid camera: Instant film cameras were first developed in the 1920s, but it wasn't until 1937 that Edwin Land created the first Polaroid camera, which produced a finished print in just 60 seconds.
• Radar: The development of radar technology was crucial during World War II, but it actually started in the 1930s with scientists working on techniques to detect the presence of objects using radio waves.
• Jet engine: British engineer Frank Whittle patented the first jet engine in 1930, although it would take several more years for practical applications to be developed. The first jet aircraft flew in 1939.

Overall, the 1930s was a decade of significant technological development and innovation, fueled in part by the economic recovery from the Great Depression and the looming threat of international conflict.