1. Gramophone   Sir Alexander Graham Bell   James Watt   Thomas Alva Edison   Elisha G. Otis   Hint Half-n-half Clue   2. Lightning Conductor   Fahrenheit   Thomas Alva Edison   John Boyd Dunlop   Benjamin Franklin   Half-n-half Clue   3. Diesel Engine   Rudolf Diesel   King C. Gillette   Benjamin Franklin   Michael Faraday   Half-n-half Clue   4. Dynamite   Michael Faraday   Benjamin Franklin   Alfred B. Nobel   Sir Alexander Graham Bell   Half-n-half Clue   5. Aeroplane   Charles Macintosh   John Logie Baird   James Watt   Orville and Wilbur Wright   Half-n-half Clue   6. Television (mechanical)   Thomas Alva Edison   Elisha G. Otis   Sir Alexander Graham Bell   John Logie Baird   Half-n-half Clue   7. Electric Lamp   Orville and Wilbur Wright   King C. Gillette   Thomas Alva Edison   John Boyd Dunlop   Half-n-half Clue