Trade Secret Protection
According to Classen’s A Practical Guide to Software Licensing for Licensees and Licensors, the following phrase may be helpful in marking an item as subject to contractual proprietary information clauses and agreements:
Proprietary and Confidential, © Copyright [Company Name] all rights reserved. (Classen 141)
April 13th, 2008 at 7:59 pm
UPDATE: According to the United States Copyright Office, the form for the notice of copyright in visually perceptible copies SHOULD contain all of the following three elements:
The Copyright Office’s circular points out that the year of first publication of the work is the year that the work, original or derivative, was first published. It also notes that “the year date MAY be omitted where a pictorial, graphic, or sculptural work, with accompanying textual matter, if any, is reproduced in or on greeting cards, postcards, stationery, jewelry, dolls, toys, or any useful articles.”