Section 44 is a powerful toolset. Section 44(d) secures a U.S. priority filing date linked to your first foreign filing, protecting your place in line. Section 44(e) allows you to obtain a U.S. registration based on your country-of-origin registration without first proving U.S. use. Together, they let you plan rationally: capture early priority, register promptly, and then build U.S. market presence on your schedule.

The “well-known marks doctrine” of the Paris Convention is a legal rule under which a trademark or service mark is protected within a nation if it is well known in that nation even though the trademark is not actually registered or used in that nation. The well-known marks doctrine is required to be available in all [...]