Analysis of this short case.

A company's director has reported to you that the main reason for the bad result in his part of the business is that a competitor is plagiarising one of your products, and unfortunately, your company doesn't have a registred trade mark and despite this, the turnover of this business has passed from 1,1 million dollars to 0,5 million dollars. What will be the suggestion to your director? And could the company claim any industrial property infringement?