Who invented the catseye and when?
Who invented cement and when ?
Who invented the electric motor and when?
Who invented the fire extinguisher and when?
Who invented the light bulb and when?
Who invented lenoleum and when?
Who invented the photography and when?
Who invented the pneumatic tyre and when?
Who invented the safety bicycle and when?
Who invented soda water and when?
Who invented the tin can and when?
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