Inventions Quizzes
Inventions Practice Test 33
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MCQ 161: The first electronic digital computer was invented in
MCQ 162: Pyrotechnic signaling system was patented by
MCQ 163: Photo phone was discovered by
MCQ 164: In which one of the following year, flashlight was patented?
MCQ 165: The first actual fiber optical cable based on John Tyndale experiment was patented by
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