How can I put my copyright info in my exif data on Nikon?

Look for the image comment feature on your cameras menu. Then just enter (c)2007, Your Name, All rights reserved and save it. You can find the feature in the Set Up menu under Image Comment. Be sure to attach the comment and then press Done.

Why should I register my work if copyright protection is automatic?

Registration is recommended for a number of reasons. Many choose to register their works because they wish to have the facts of their copyright on the public record and have a certificate of registration. Registered works may be eligible for statutory damages and attorney's fees in successful litigation. Finally, if registration occurs within 5 years of publication, it is considered prima facie evidence in a court of law.

When is my work protected by copyright ?

Your work is under copyright protection the moment it is created and fixed in a tangible form that it is perceptible either directly or with the aid of a machine or device.

How is a copyright different from a patent or a trademark?

Copyright protects original works of authorship, while a patent protects inventions or discoveries. Ideas and discoveries are not protected by the copyright law, although the way in which they are expressed may be. A trademark protects words, phrases, symbols, or designs identifying the source of the goods or services of one party and distinguishing them from those of others.