For which monarch was the first handmade stapling machine invented? When was the safety pin created? What were the toothbrushes in ancient times made of? What were pencils first used for?This book is filled with facts about inventions that seem simple, but paved the way for other bigger discoveries.
Simple Inventions that changed the world
₹125.00 Regular Price
Aurthor :Om Books Editorial Team
Publisher :Om Books International