"Inspiring young inventors, from ages 5 to 19" Of the thousands of inventions filed each year since 1790 with the United States Patent Office, some have come from neterprising kids, and not just those who have grown up to be famous adult inventors. Here are the stories of twenty ingenious young Americans. Among them are Chester Greenwood, creator of ear muffs; Ralph Samuelson, originator of water-skiing; Vanessa Hess and her colored car wax; and Jerrald Spencer, whose electronic gizmo has made a line of toys so popular that over five million of them have been sold
具體描述
讀後感
評分
評分
評分
評分
評分
用戶評價
评分
评分
评分
评分
评分
相關圖書
本站所有內容均為互聯網搜索引擎提供的公開搜索信息，本站不存儲任何數據與內容，任何內容與數據均與本站無關，如有需要請聯繫相關搜索引擎包括但不限於百度，google,bing,sogou 等
© 2025 book.quotespace.org All Rights Reserved. 小美書屋 版权所有