1. Ball-Point Pen   G. Ferdinand Von Zeppelin   Dr. Alan M. Turing   John J. Loud   Lewis E. Waterman   Hint Half-n-half Clue   2. Hovercraft   Karl Benz   Otto   Christopher Cockerell   William Siemens   Half-n-half Clue   3. Electric Motor (AC)   Louis Pasteur   Nikola Tesla   Bardeen, Shockley, Brattain   Roger Bacon   Half-n-half Clue   4. Electric Battery   Dr. Wallace H. Carothers   William Siemens   Alessandro Volta   Lewis E. Waterman   Half-n-half Clue   5. Electric Furnace   Robert Wilhelm Von Bunsen   William Siemens   Z. Janssen   Dr. Alan M. Turing   Half-n-half Clue   6. Airship (rigid)   Robert Wilhelm Von Bunsen   John Napier   Christopher Cockerell   G. Ferdinand Von Zeppelin   Half-n-half Clue   7. Transistor   Dr. Wallace H. Carothers   Bardeen, Shockley, Brattain   C. F. Brush   Edward Jenner   Half-n-half Clue