1. Ball-Point Pen   Johann Gutenberg   Leo H Baekeland   John J. Loud   Z. Janssen   Hint Half-n-half Clue   2. Barometer   Lewis E. Waterman   Gottlieb Daimler   Evangelista Torricelli   Leo H Baekeland   Half-n-half Clue   3. Transistor   Robert Wilhelm Von Bunsen   Johann Gutenberg   Gottlieb Daimler   Bardeen, Shockley, Brattain   Half-n-half Clue   4. Bicycle   Robert Wilhelm Von Bunsen   John J. Loud   Dr. William Stokes, Rene Laennec   Kirkpatrick Macmillan   Half-n-half Clue   5. Internal Combustion Engine   John Napier   Leo H Baekeland   Roger Bacon   Otto   Half-n-half Clue   6. Fountain Pen   Lewis E. Waterman   Gottlieb Daimler   John Napier   G. Ferdinand Von Zeppelin   Half-n-half Clue   7. Carburettor   Roger Bacon   Karl Benz   Gottlieb Daimler   Z. Janssen   Half-n-half Clue