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Trademark Assignments: Assignment text data (no images) in CY2020. The file format is eXtensible Markup Language (XML) in accordance with the U.S. Trademark Assignments Version 0.4 Document Type Definition (DTD). United States Patent and Trademark Office - Open Data Portal An API is an Application Programming Interface. It is a set of routines, protocols, and tools for building software and applications. A good API makes it easier to develop a program by providing all the building blocks, which are then put together by the programmer.
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