This is not an exhaustive list. See the USPTO’s Glossary at https://www.uspto.gov/learning- and- resources/glossary for a more complete list of definitions regarding USPTO matters and see also the USPTO Trademarks Resources and Glossary .
Amendment to Allege Use. An AAU or SOU (Statement of Use) is a form to file in an intent- to- use- based application to attest use in commerce of the trademark in the application for all of the goods or services in the application. The difference between an AAU and an SOU is the timing of the filing. An AAU is filed before an application receives its Notice of Allowance and an SOU is filed after the application receives its Notice of Allowance.
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