U.S. Padlock Patents Book
book contains over 2,000 padlock patents.
The book is over 225mb in size and does not lend itself to be printed in paper
format. The book is in the industry standard PDF format.
Traditionally we have not charged for our work but due to the magnitude of this
project we find it necessary to charge $20.00 per copy.
Once you order your copy of the book you will receive a link to download a