1. Aeroplane   Orville and Wilbur Wright   Charles Macintosh   Rudolf Diesel   Michael Faraday   Hint Half-n-half Clue   2. Movie Projector   Sir Alexander Graham Bell   King C. Gillette   Thomas Alva Edison   John Logie Baird   Half-n-half Clue   3. Steam Engine (condenser)   James Watt   Sir Alexander Graham Bell   Rudolf Diesel   Thomas Alva Edison   Half-n-half Clue   4. Gramophone   Orville and Wilbur Wright   Thomas Alva Edison   Benjamin Franklin   Rudolf Diesel   Half-n-half Clue   5. Transformer   Sir Alexander Graham Bell   Michael Faraday   Thomas Alva Edison   Charles Macintosh   Half-n-half Clue   6. Lightning Conductor   Samuel Morse   Benjamin Franklin   Fahrenheit   Thomas Alva Edison   Half-n-half Clue   7. Safety Razor   Benjamin Franklin   Sir Alexander Graham Bell   King C. Gillette   Orville and Wilbur Wright   Half-n-half Clue