Originally Posted by JonM
Its been a long time since i learned about this stuff in school so dont quote me, but I'm pretty sure you're entitled to basic copyright protection as soon as your work is "committed to a tangible medium of expression." Basic protection means you can make them stop using your work.
Getting an official copyright allows you to get $ damages on top of making them stop.
I don't think you need to have a registered copyright to stop anyone. You can still sue to keep others from using the work, but you will have to go to court and prove that you are the creator. Copyright protection starts the moment you create an original work.
I would also add that depending upon the situation, the ownership of the copyright might belong to staff member(s) or to AHS. In most cases if it is/was an employee of AHS who came up with the design, it is considered a work for hire and the copyright belongs to AHS, but there are some rather esoteric rules that can be used to determine the status of a work when there isn't an explicit contract assigning IP rights.