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Inventions Exam Prep: Mock Test 68
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The MCQs: In which one of following year, saxophone was patented; "Sexaphone" App (Android, iOS) with answers: 1879, 1845, 1846, and 1866 for online schools. Practice inventions and inventors questions and answers, Apple Book to download free sample for distance learning.
In which one of the following year, saxophone was patented?
Acrylic resin, which was quickly transformed into acrylic paint was discovered by
Sound recording was invented by an American businessman named as
In which one of the following year the first petrol engine was invented by a German engineer?
An American Cevil engineer invents the Ferris Wheel in
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