The Pattern of Progress Through Patents

Author:  H.J. Plaster
Source:  ABC, Vol 1/ No 4, Fall 1996
Doc ID:  1996162
Year of Publication:  1996
Abstract:  
The following is an excerpt from Blast Cleaning and Allied Processes - Volume 1 by H.J. Plaster. This book is an invaluable resource for our industry and we will be sharing parts of it with you in the new few issues of the newsletter. Machine Designs The following resume of the principal patents over the 100 years since the first was taken our in the year 1870, produces many points of considerable interest. Those selected are representative of the more important patents and are indicative of the stage in development or the original thought at a particular moment in time.