1. Jet Engine   Bardeen, Shockley, Brattain   Christopher Cockerell   Leo H Baekeland   Sir Frank Whittle   Hint Half-n-half Clue   2. Laboratory Gas Burner   Christopher Cockerell   Robert Wilhelm Von Bunsen   H. W. Seeley   John J. Loud   Half-n-half Clue   3. Carburettor   Sir Frank Whittle   Gottlieb Daimler   Sir Isaac Pitman   Nikola Tesla   Half-n-half Clue   4. Refrigerator   Johann Gutenberg   Karl Benz   James Harrison, Alexander Catlin   William Siemens   Half-n-half Clue   5. Stethoscope   Bardeen, Shockley, Brattain   Leo H Baekeland   Dr. William Stokes, Rene Laennec   James Harrison, Alexander Catlin   Half-n-half Clue   6. Air Pump   Andre-Marie Ampere   Otto   Robert Wilhelm Von Bunsen   Otto von Guericke   Half-n-half Clue   7. Power Loom   Edmund Cartwright   John J. Loud   Robert Wilhelm Von Bunsen   Edward Jenner   Half-n-half Clue