Inventions MCQs (Grade 8) From Textbook
Free Inventions Notes App | Light Bulb Leds e-Book PDF Download
Inventions Certification MCQs – Mock Test 111
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The MCQ: In which one of following year light bulb led were patented; "Inventions Notes" App (iOS, Android) with answers: 1813, 1875, 1873, and 1892 for online certifications. Study inventions and inventors questions and answers, Google e-Book to download free chapter for online study.
In which one of the following year light bulb led were patented?
Space shuttle was invented by
The transformer was invented by
In which one of the following year, Goalie mask was invented?
In which one of the following year, elevator was invented?
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