Inventions Quizzes
Inventions Practice Test 81
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The MCQ Quiz: In which one of the following year, optical fiber was patented; "Fiber Optics" App Download (Android & iOS) Free with answers 1997, 1888, 1899 and 1952 for taking online classes. Study inventions and inventors questions and answers, Apple Book to download free sample for distance learning.
MCQ 401: In which one of the following year, optical fiber was patented?
MCQ 402: Baby bouncer for prewalking was discovered by
MCQ 403: The optical microscope was invented by
MCQ 404: The first patent for bar code was issued by
MCQ 405: In which one of the following year, alkaline storage batteries were invented?
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