MCF patent grant (classification sequence)

Patent and patent application classification information (current) available bimonthly (odd months) (patent classification products)

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Classification Standards and Development (CSD) maintains the patent classification systems.
Current U.S. classification information for all patent grants issued by the USPTO from 1790 to present. Approx. 450 main divisions of technology, called classifications/classes, broken into approx. 150,000 subdivisions, called subclassifications/subclasses. Provided in classification sequence, by U.S. classification/subclassification (original and cross reference) followed by patent grant number with the format of ASCII text.
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