1. Lewis E. Waterman   Shorthand   Power Loom   Fountain Pen   Laboratory Gas Burner   Hint Half-n-half Clue   2. Karl Benz   Refrigerator   Fountain Pen   Barometer   Automobiles using gasoline   Half-n-half Clue   3. Roger Bacon   Printing Press   Gunpowder   Barometer   Power Loom   Half-n-half Clue   4. Gottlieb Daimler   Laboratory Gas Burner   Refrigerator   Internal Combustion Engine   Carburettor   Half-n-half Clue   5. Otto   Internal Combustion Engine   Automobiles using gasoline   Electronic Computer   Jet Engine   Half-n-half Clue   6. Leo H Baekeland   Laboratory Gas Burner   Fountain Pen   Bakelite   Submarine   Half-n-half Clue   7. Sir Isaac Pitman   Power Loom   Stethoscope   Shorthand   Ball-Point Pen   Half-n-half Clue