United States Defensive Publication

[1] US Defensive Publications can be searched in the United States Patent and Trademark Office's (USPTO) patent search web page.

[2] They are designated by a "T" in the publication number, the letter "T" referring to "Technical disclosure".

[3] This is in contrast to statutory invention registrations, which are prior art as of their filing dates in the same manner as U.S.

[3] However, a defensive publication may be the subject of an interference proceeding for five years from its earliest effective U.S. filing date.

This article relating to law in the United States or its constituent jurisdictions is a stub.