Placing Copyright Notices In Documentation
A user has reported that the URL we had indexed no longer works properly.
This link is offline until a volunteer finds a new, valid URL for the work and updates our site.

Isenberg, Doug
TECHWR-L
2000

Abstract:

There's no legal reason not to include a copyright notice on every page of a printed manual, every slide of a PowerPoint presentation, or every page of a Web site. But, of course, too many copyright notices can become unruly and unattractive, so the practical question is whether there is a legal reason why copyright notices should be printed on every page of a document.