اذا لم تجد ما تبحث عنه يمكنك استخدام كلمات أكثر دقة.
Author: Collins, A. Frederick (Archie Frederick), 1869-1952
LoC No.: 16022889
Title: Inventing for Boys
Contents: Preface -- Getting an idea -- Working it out on paper -- The state of the art -- How to experiment -- Making a model -- How to patent your invention -- Making your invention pay -- Some hints of manufacturing -- Putting it on the market -- Things for you to invent -- What some inventions have paid -- Profitable information -- Appendices -- Some words and terms used in this book.
Language: English
LoC Class: T: Technology
Subject: Inventions
Release Date: May 28, 2015
Copyright Status: Public domain in the USA.
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