The rule mandating foreign-domiciled trade mark owners to use a US-licensed attorney for trade mark work in the USPTO came into force on August 3 2019 (read more here). As expected, the rule has generated further enquiries and concerns and the Office has responded by publishing a revised guidance document on how it will be implemented.
The guide covers how the Office will examine applications and the eligibility of representatives under the new rule. The USPTO says that it will continue to "monitor implementation of this rule and may issue revised and/or additional guidance as needed in the future". Read the revised guide (dated September) here.