1. Pneumatic Tyres   John Boyd Dunlop   Sir Alexander Graham Bell   Rudolf Diesel   Charles Goodyear   Hint Half-n-half Clue   2. Aeroplane   Orville and Wilbur Wright   Charles Macintosh   Michael Faraday   Benjamin Franklin   Half-n-half Clue   3. Bifocal Lens   Rudolf Diesel   Thomas Alva Edison   Charles Goodyear   Benjamin Franklin   Half-n-half Clue   4. Lightning Conductor   Benjamin Franklin   Sir Alexander Graham Bell   Samuel Morse   Alfred B. Nobel   Half-n-half Clue   5. Vulcanised Rubber   James Watt   Charles Goodyear   Elisha G. Otis   Samuel Morse   Half-n-half Clue   6. Electric Lamp   James Watt   Michael Faraday   Thomas Alva Edison   Elisha G. Otis   Half-n-half Clue   7. Safety Razor   King C. Gillette   James Watt   Thomas Alva Edison   Sir Alexander Graham Bell   Half-n-half Clue