Across
- 3. Air-cushion vehicle
- 5. Interstate road system
- 8. Bass speaker
- 9. Protective breathing device
- 10. Wine opener
- 11. Ancient timekeeper
- 13. Non-lethal weapon
- 14. Building ascender
- 18. Skydiver's safety gear
- 20. One-wheeled cart
- 21. Aid auditory assist
- 24. Handheld math device
- 25. Arcade game machine
Down
- 1. Synthetic material
- 2. Logging tool
- 4. Tree-cutting tool
- 6. Dental hygiene product
- 7. Food storage innovation
- 12. Amplified speaking device
- 15. Early writing machine
- 16. Portable music player
- 17. Portable light source
- 19. Sharpener for writing tool
- 22. Noise-canceling inserts
- 23. Fastener tool