Digital Copyright Slider
Basic gauge for determining copyright protection for works first published in the U.S.A.

Espacenet
This European Patent Office (EPO) site provides access to 100 million European documents in multiple languages.

Inventors Assistance League
Local nonprofit group that can help you evaluate, protect, patent and market your ideas.

United States Copyright Office
Information on copyright laws, policies, procedures, and more.

United States Patent and Trademark Office
Learn how to get a patent, what kind of patent is best for you, search for patents, how to trademark your idea, and more.

WATCH (Writers, Artists, and Their Copyright Holders) File
A database of copyright contacts for writers, artists and prominent people in other creative fields in the U. S. and Britain.

When Works Pass Into The Public Domain
Simple chart explaining when copyright runs out for printed material.