Inventions Practice Tests
Inventions Online Tests
The Half tone engraving Multiple Choice Questions (MCQ Quiz) with Answers PDF (Half Tone Engraving MCQ PDF e-Book) download to practice Inventions Tests. Learn Inventions and Inventors Multiple Choice Questions and Answers (MCQs), Half Tone Engraving quiz answers PDF for online elementary school classes. The Half Tone Engraving MCQ App Download: Free learning app for modern neuroscience, foot bag, post-it-note, a.c test prep for virtual online school.
The MCQ: Halftone engraving was patented by; "Half Tone Engraving" App Download (Free) with answers: Sir Nikola Tesla; Sir Desbarats; Sir William Augustus Legge; for online elementary school classes. Solve Inventions and Inventors Quiz Questions, download Google eBook (Free Sample) for school certificate.
In which one of the following year, half tone engraving was patented?
Halftone engraving was patented by
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