Challenging puzzle for experienced crossword solvers
Hidden Minds Behind Lost Innovations
Moderate difficulty suitable for most players
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6
Across
- 1. Englishman credited with inventing the knitting machine in 1589
- 2. Engineer whose forgotten designs predated the famous observation wheel
- 3. Early designer of a vertical-axis wind turbine
Down
- 4. Innovator behind early vacuum cleaner prototypes
- 5. Brothers who pioneered hot air balloon flight in 1783
- 6. Invented an early form of the modern lighthouse lens
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