The US Patent and Trademark Office (USPTO) requires trademark owners to support their trademark registrations by providing one specimen of use per class, at both 6 years and 10 years after the trademark registration date. So, for instance, if you have a registration covering ‘clothing, footwear and headgear’ in class 25, providing the US trademark office with an example of the mark being used on a baseball cap will be sufficient to support the registration in respect of all goods covered by the registration, despite the fact a specimen of use had only been provided in respect of one item of headgear.