Practice Class 8 MCQs From Textbooks
Download Toothbrush Notes App | Inventions Book PDF
Inventions Competitive Exam: Mock Test 163
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The Quiz: In which one of following year, toothbrush was patented; "Toothbrush" App (iOS, Android) with answers: 1723, 1780, 1765, and 1748 for online study. Study inventions and inventors questions and answers, Google eBook to download free chapter for online elementary school.
In which one of the following year, toothbrush was patented?
Early stroller was developed by
In which one of the following country, mouse pad was patented?
Sphairistike, which evolved into modern outdoor tennis was discovered by
In which country, chemical foam extinguisher was invented?
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