I own a boutique and I received a "cease and desist" notification from the lawyer for another boutique based on trademark infringement. The owner has a portion of the name of my boutique trademarked. I formed my corporation and started my business in the said name prior to the date she trademarked the name. I'm hoping this is a valid defense. Before I chose the name of my store I searched trademarked names and nobody had the name of my store trademarked at that time. I guess in retrospect I wish I had trademarked the name first. Any advice on how to handle this would be greatly appreciated.