1. Internal Combustion Engine   Karl Benz   Robert Wilhelm Von Bunsen   Otto   G. Ferdinand Von Zeppelin   Hint Half-n-half Clue   2. Microscope   Evangelista Torricelli   Gottlieb Daimler   Z. Janssen   Otto   Half-n-half Clue   3. Power Loom   Gottlieb Daimler   Edmund Cartwright   Kirkpatrick Macmillan   Roger Bacon   Half-n-half Clue   4. Transistor   Lewis E. Waterman   Edmund Cartwright   Johann Gutenberg   Bardeen, Shockley, Brattain   Half-n-half Clue   5. Stethoscope   Dr. William Stokes, Rene Laennec   Dr. Alan M. Turing   Sir Isaac Pitman   Lewis E. Waterman   Half-n-half Clue   6. Airship (rigid)   Karl Benz   Edmund Cartwright   G. Ferdinand Von Zeppelin   Z. Janssen   Half-n-half Clue   7. Electronic Computer   Gottlieb Daimler   Sir Frank Whittle   Robert Wilhelm Von Bunsen   Dr. Alan M. Turing   Half-n-half Clue