Inventions Quizzes
Inventions Practice Test 58
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The Quiz: In which one of following year, mechanical slot machines were patented; "Slot Machines" App Download (Free) with answers ‘1895’, ‘1874’, ‘1806’ and ‘1844’ for online courses. Solve inventions and inventors questions and answers, Amazon eBook to download free sample for distance learning.
MCQ 286: In which one of the following year, mechanical slot machines were patented?
MCQ 287: Bunsen burners were patented by
MCQ 288: Dental braces were invented in
MCQ 289: Tranquilizer gun was invented by a New Zealand veterinarian named as
MCQ 290: The first petrol engine was invented by a German engineer named as
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