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General Knowledge on Inventions | GK Test on Inventions Page 18
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Inventions

General Knowledge on Inventions

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171. Who was invented in 1833 first lock-stitch sewing machine?
172. In which year was invented cotton gin by Eli Whitney?
173. Type of resistor with electrical resistance inversely proportional to its temperature is invented by
174. In which year was invented first gasoline powered or petrol powered automobile? 
175. First graphical user interface used commercially after its introduction was popularized as
176. Which used cold cathode diode was invented by German Physicist?
177. In which first machine gun named 'Maxim Gun' was invented by American inventor Hiram Stevens Maxim?
178. Which is part of modern music is famous musical invention of George Beauchamp?
179. In which year invented is world's first microwave oven?
180. In which year invented is Christopher Sholes design type writers and computers keyboards?

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