We believe that our intellectual property has substantial value and has contributed significantly to the success of our business. We pursue the registration of our domain names, trademarks, service marks and patentable technology in Canada, the United States and in certain other jurisdictions. In particular, our trademarks, including our registered DAVIDsTEA and DAVIDsTEA logo design trademarks and the unregistered names of a significant number of the varieties of specially blended teas that we sell, are valuable assets that reinforce the distinctiveness of our brand and our customers' favorable perception of our stores.
We also strive to protect our intellectual property rights by relying on federal, state and common law rights, as well as contractual restrictions with our employees, contractors (including those who develop, source, manufacture, store and distribute our tea blends, tea accessories and other tea-related merchandise), vendors and other third parties. However, we may not enter into confidentiality and/or invention assignment agreements with every employee, contractor and service provider to protect our proprietary information and intellectual property ownership rights. In addition, although we have exclusivity agreements with each of our significant suppliers who performs blending services for us, or who has access to our designs, we may not be able to successfully protect the tea blends and designs to which such suppliers have access under trade secret laws, and the periods for exclusivity governing our tea blends last for periods as brief as 18 months. Unauthorized disclosure of or claims to our intellectual property or confidential information may adversely affect our business.
From time to time, third parties have sold our products using our name without our consent, and, we believe, have infringed or misappropriated our intellectual property rights. We respond to these actions on a case-by-case basis and where appropriate may commence litigation to protect our intellectual property rights. However, we may not be able to detect unauthorized use of our intellectual property or to take appropriate steps to enforce, defend and assert our intellectual property in all instances.
Effective trade secret, patent, copyright, trademark and domain name protection is expensive to obtain, develop and maintain, Our failure to register or protect our trademarks could prevent us in the future from using our trademarks or challenging third parties who use names and logos similar to our trademarks, which may in turn cause customer confusion, impede our marketing efforts, negatively affect customers' perception of our brand, stores and products, and adversely affect our sales and profitability. Moreover, intellectual property proceedings and infringement claims brought by or against us could result in substantial costs and a significant distraction for management and have a negative impact on our business. We cannot assure you that we are not infringing or violating, and have not infringed or violated, any third-party intellectual property rights, or that we will not be accused of doing so in the future.
In addition, although we have also taken steps to protect our intellectual property rights internationally, the laws of certain foreign countries may not protect intellectual property to the same extent as do the laws of the United States and Canada and mechanisms for enforcement of intellectual property rights may be inadequate in those countries. Other entities may have rights to trademarks that contain portions of our marks or may have registered similar or competing marks in foreign countries. There may also be other prior registrations in other foreign countries of which we are not aware. We may need to expend additional resources to defend our trademarks in these countries, and the inability to defend such trademarks could impair our brand or adversely affect the growth of our business internationally.