You can claim a trademark on anything by using the TM Symbol, but you can't use the registered trademark symbol (R) unless you have registered the trademark with the US Patent and Trademark Office.  

Here's a link to InterNACHI's Policy on Logo Designs for Members.

Using the registered trademark symbol for a trademark you have not registered could subject your company to negative publicity and/or a civil suit, and in very rare cases criminal penalties.

The author of this communication is not a lawyer licensed to give legal advice or perform legal services.  Information conveyed in this communication is general information only and does not provide legal advice or opinions. The information conveyed in this communication should not be construed as, and should not be relied upon for, legal or tax advice in any particular circumstance or fact situation.  The information conveyed in this communication may not reflect the most current legal developments. No action should be taken in reliance on the information contained in this communication and we disclaim all liability in respect to actions taken or not taken based on any or all of the contents of this communication to the fullest extent permitted by law. The author of this communication does not represent InterNACHI, or any other party, as an attorney. An attorney should be contacted for advice on specific legal issues.