Here are some inventions from the 1930s:

 Polystyrene was invented in the 1930's 
Chocolate Chips was invented in 1939
Scotch Tape was also invented in the 1930's
Also DuPont invented neoprene.
Frozen food process patented in the 30's
Frank Whittle and Dr Hans von Ohain made a jet engine in the 30's
Also baby food was invented in the 30's
Nylon was invented in the 30's
Road Reflectors were invented in 1934
The Cheeseburger was invented in 1934
The radio was invented in the 1930's
Electric Razor was invented in 1931
The Trampoline was invented in 1934
Ballpoint pen was invented in 1938
Instant coffee was invented in 1938 also.
Radar was invented in 1934
Parking meter invented in 1935
First helicopter invented in 1936
The pesticide DDT was introduced in 1939
The first antibiotic was invented in 1939
Radio telescope was invented in 1932

The 1930s had many inventions. most of they're inventions were based off of food. if you look at my list you will find many different kinds of food. also many tools that use electricity were invented. Without frozen food you wouldn't be able to cook food in a matter of around 20 minutes. the 1930s was a new age of technology. life sure was made easier in the great 30s! (besides the Great Depression!). I have , with no doubt that the 1930s had great inventions!!!!!!!!!!!!!!!!!!!!!!