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PTDL Home

Introduction

Fundamentals of Intellectual Property

Patent Types and Terminology

Examples of Patent Questions

How to Conduct Patent Searches
Searching Part I
Searching Part II

Best practices for assisting patrons

Resources for Inventors

Patent Searching Tutorial

Patent Searching Exercises

Welcome to NCSU Libraries

How to conduct patent searches- Part I

Tools for searching for patents

Multi Step Process

CASSIS vs. USPTO web site comparison chart
FEATURE CASSIS USPTO
Coverage

full-text from 1976, full page images from 1790

can keyword search from 1969

full-text from 1976, full-page images since 1790

can keyword search from 1976

Updated every two months weekly, on Thursdays
Printing can print whole image at once- usually have to change DVDs frequently if printing multiple copies. must install TIFF viewer- prints one page at a time
Downloading can download into spreadsheet cannot download into spreadsheet
Availability Only at PTDLP libraries Anywhere

How to conduct patent searches...Part Two
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