Across
- 2. What did Thomas Alva Edison invent in 1877?
- 4. What do inventors get for their inventions in order to keep ownership of the rights?
- 6. One of the things Hedy Lamar's invention is used in today.
- 7. What did record players play?
Down
- 1. How did people sew before the sewing machine?
- 3. What was Hedy Lamarr most known for being?
- 5. What was the machine that Issac Singer invented in 1851 used for?