1. Transformer   Michael Faraday   Sir Alexander Graham Bell   John Boyd Dunlop   Charles Goodyear   Hint Half-n-half Clue   2. Microphone   Michael Faraday   Samuel Morse   Thomas Alva Edison   Sir Alexander Graham Bell   Half-n-half Clue   3. Pneumatic Tyres   Fahrenheit   Samuel Morse   Sir Alexander Graham Bell   John Boyd Dunlop   Half-n-half Clue   4. Bifocal Lens   Benjamin Franklin   Thomas Alva Edison   James Watt   Michael Faraday   Half-n-half Clue   5. Diesel Engine   John Logie Baird   Sir Alexander Graham Bell   Rudolf Diesel   Fahrenheit   Half-n-half Clue   6. Television (mechanical)   Benjamin Franklin   John Logie Baird   Orville and Wilbur Wright   Charles Macintosh   Half-n-half Clue   7. Gramophone   Thomas Alva Edison   Benjamin Franklin   Elisha G. Otis   Rudolf Diesel   Half-n-half Clue