1. Jet Engine   Lewis E. Waterman   Karl Benz   Kirkpatrick Macmillan   Sir Frank Whittle   Hint Half-n-half Clue   2. Laboratory Gas Burner   Gottlieb Daimler   Sir Frank Whittle   G. Ferdinand Von Zeppelin   Robert Wilhelm Von Bunsen   Half-n-half Clue   3. Rabies Vaccine   Gottlieb Daimler   Robert Wilhelm Von Bunsen   Louis Pasteur   G. Ferdinand Von Zeppelin   Half-n-half Clue   4. Transistor   Dr. Alan M. Turing   Kirkpatrick Macmillan   Bardeen, Shockley, Brattain   John Napier   Half-n-half Clue   5. Electronic Computer   Evangelista Torricelli   Kirkpatrick Macmillan   Bardeen, Shockley, Brattain   Dr. Alan M. Turing   Half-n-half Clue   6. Bakelite   Kirkpatrick Macmillan   Leo H Baekeland   Gottlieb Daimler   James Harrison, Alexander Catlin   Half-n-half Clue   7. Refrigerator   James Harrison, Alexander Catlin   Z. Janssen   Sir Isaac Pitman   David Bushnell   Half-n-half Clue