Top 20 Completely Useless Inventions 20. Non stick Cellotape 19. Solar Powered Flash Light (torch) 18. A black highlighter pen 17. Glow in the dark sunglasses 16. Inflatable Anchor 15. Smooth Sandpaper 14. Waterproof sponge 13. Waterproof Teabags 12. AC adapter for Solar powered calculators 11. Fireproof Matches 10. Fireproof Cigarettes 9. Battery powered Battery Charger 8. Seatbelts for Motorbikes 7. Hand powered Chainsaw 6. Inflatable Dartboard 5. Silent Alarm Clock 4. A Pedal powered wheelchair 3. Braille Drivers Manual 2. Double sided playing cards 1. Ejector seats for Helicopters