1. Bifocal Lens   Charles Goodyear   Charles Macintosh   Benjamin Franklin   Thomas Alva Edison   Hint Half-n-half Clue   2. Aeroplane   Orville and Wilbur Wright   Samuel Morse   Fahrenheit   James Watt   Half-n-half Clue   3. Electric Generator   Benjamin Franklin   Michael Faraday   King C. Gillette   Rudolf Diesel   Half-n-half Clue   4. Mercury Thermometer   John Boyd Dunlop   King C. Gillette   Fahrenheit   Benjamin Franklin   Half-n-half Clue   5. Elevator   John Logie Baird   Elisha G. Otis   Sir Alexander Graham Bell   John Boyd Dunlop   Half-n-half Clue   6. Movie Projector   Charles Goodyear   Charles Macintosh   Orville and Wilbur Wright   Thomas Alva Edison   Half-n-half Clue   7. Microphone   Charles Macintosh   Sir Alexander Graham Bell   Alfred B. Nobel   Orville and Wilbur Wright   Half-n-half Clue