1. Gramophone   Thomas Alva Edison   Michael Faraday   Sir Alexander Graham Bell   Rudolf Diesel   Hint Half-n-half Clue   2. Lightning Conductor   Elisha G. Otis   Michael Faraday   Sir Alexander Graham Bell   Benjamin Franklin   Half-n-half Clue   3. Movie Projector   Michael Faraday   John Boyd Dunlop   Rudolf Diesel   Thomas Alva Edison   Half-n-half Clue   4. Telegraph Code   John Logie Baird   Samuel Morse   Thomas Alva Edison   Charles Goodyear   Half-n-half Clue   5. Electric Lamp   James Watt   Charles Macintosh   Samuel Morse   Thomas Alva Edison   Half-n-half Clue   6. Television (mechanical)   Charles Goodyear   John Logie Baird   Sir Alexander Graham Bell   Benjamin Franklin   Half-n-half Clue   7. Elevator   Fahrenheit   Elisha G. Otis   Sir Alexander Graham Bell   Michael Faraday   Half-n-half Clue