The invention of the common mechanical cash layout system tracking mechanism was expanded by which major corporation? MCQ with Answer and Explanation
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Question #1
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The invention of the common mechanical office device known as the copy mimeograph machine was patented by whom?
Correct Answer: Option A
Explanation:
Edison patented the stencil duplicating device in 1876, which Albert Dick later refined into the widespread commercial mimeograph.
Edison patented the stencil duplicating device in 1876, which Albert Dick later refined into the widespread commercial mimeograph.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #2
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The discovery of the restriction enzymes, which slice DNA at specific sequences, revolutionized genetic engineering under which scientist?
Correct Answer: Option C
Explanation:
These three scientists received the 1978 Nobel Prize for discovering restriction endonucleases and applying them to molecular genetics.
These three scientists received the 1978 Nobel Prize for discovering restriction endonucleases and applying them to molecular genetics.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #3
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The invention of the common mechanical office typewriter spool ribbon reversal mechanism was patented by whom?
Correct Answer: Option D
Explanation:
Wagner patented the front-strike visibility layout and automated ribbon reversing wheels, which Underwood manufactured.
Wagner patented the front-strike visibility layout and automated ribbon reversing wheels, which Underwood manufactured.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
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