Trademark and Copyright Prosecution and Licensing
Many members of the public treat images that have been posted on the internet as if they have been dedicated to the public domain by the authors. While that might be the case in some instances, the mere posting of an image to the internet does not indicate that it has been dedicated to the public domain or prevent the author from suing for copyright infringement. Unless the author has expressly indicated an intent to put the work into the public domain, such an intent will not be implied merely because the work was posted online—even if the work was posted without a copyright notice.
Businesses routinely hire creative professionals to generate new content, whether for internal use or for distribution to the public at large. If you pay these individuals either an hourly or flat fee to generate this content for you, don't you own any resulting copyright?
Before finalizing the name of the business and investing in things like signage, advertising, or website design, it's important to determine whether someone else may have prior rights to the name.
You can establish rights in a trademark based solely upon the sale of goods bearing that mark to the public.