What did they invent?

Across
2. Otis Boykin invented this and it's used in computers, radios and televisions.
4. Charles Goodyear is famous for inventing a stronger rubber that is used to make these.
5. Douglas worked with NASA before he invented this useful part for a computer.
8. Maragaret Knight did not invent this type of bag,  but she improved it to make it stronger.
11. Federick Grant Banting with his partner Charles best invented this live saving "medicine" in 1970.
12. Helen Belyea was the first female in this profession until 1970.
13. Edwin Perkins invented this treat.
Down
1. Tetsuya Fujita invented the "F" scale to measure this type of natural disaster.
3. This tool used by many people including a weather forecaster was named after Anders Celsius.
6. Mickey Mouse's first big role was in a sound film called __________ Willie.
7. Walt Disney is famous for making these more realistic.
9. Students must be very glad Levi Strauss invented these.
10. James Richard was just improving the strength of a spring when his wife "discovered" this fun toy.