Across
- 4. Invented the Home Security in 1966
- 8. Invented the gas mask in 1923
- 9. Invented America's first clock in 1790
Down
- 1. Invented the Improved electrical resistor in 1959
- 2. Invented the potato chip in 1853
- 3. Invented the electronic microphone in 1962
- 4. Invented computer inventions in 1980
- 5. Invented the special steamboat propeller in 1887
- 6. Invented the super soaker toy in 1987
- 7. Invented the automatic lubricator in 1916