Miscellaneous : Inventions That Didn't Succeed
Inventions That Didn't Succeed
- The waterproof towel
- Glow in the dark sunglasses
- Solar powered flashlights
- Submarine screen doors
- A book on how to read
- Inflatable dart
boards
- A dictionary index
- Powdered water
- Waterproof tea
bags
- The helicopter ejector seat
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