The USPTO periodically updates its database of approved
identifications of goods and services. https://idm-tmng.uspto.gov/id-master-list-public.html.
These changes often are made to conform
to updates in the international Nice Classification system. Another source of changes is user suggestions
to add identifications for types of goods/services or goods/services which are
not well-covered in the existing USPTO Manual of Acceptable Identifications.More