Current U.S. classification information for all patent applications (non-provisional utility and plant) published by the USPTO from March 15, 2001 to present. Approx. 450 main divisions of technology, called classifications/classes, broken into approx. 150,000 subdivisions, called subclassifications/subclasses. Provided in published patent application number sequence with the current U.S. original classification/subclassification and any cross-reference classification/subclassifications with the format of ASCII text.