1. Elevator   Rudolf Diesel   Thomas Alva Edison   Alfred B. Nobel   Elisha G. Otis   Hint Half-n-half Clue   2. Safety Razor   Charles Goodyear   King C. Gillette   Orville and Wilbur Wright   Thomas Alva Edison   Half-n-half Clue   3. Diesel Engine   John Logie Baird   Sir Alexander Graham Bell   Michael Faraday   Rudolf Diesel   Half-n-half Clue   4. Telegraph Code   Sir Alexander Graham Bell   Michael Faraday   Charles Macintosh   Samuel Morse   Half-n-half Clue   5. Gramophone   Sir Alexander Graham Bell   Benjamin Franklin   Michael Faraday   Thomas Alva Edison   Half-n-half Clue   6. Dynamite   Thomas Alva Edison   Orville and Wilbur Wright   Rudolf Diesel   Alfred B. Nobel   Half-n-half Clue   7. Lightning Conductor   John Logie Baird   Fahrenheit   Thomas Alva Edison   Benjamin Franklin   Half-n-half Clue