Developers Copyright

Just assert your copyright in the program code (if supplied) in the executable and in any documentation - assuming that you have not relinquished the copyright in the contract you have with your customer.<p>You do not need an special clauses - just a standard copyright notice.<p>If your customer wants a written license - then you might ensure that this includes the words "non exclusive".

So do you think something like this is appropriate;<p>"My Company grants the right to reuse the CSS styles, JavaScript, PHP scripts, XHTML markup techniques, Database design and other bits of “source code” for the non exclusive use of the Client. The Client may freely copy, paste, and modify any of this code for use in other web projects large or small, commercial or non-commercial. The client need not ask permission to do so. The client need not credit My Company or its employees."