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U.S. Patent Application Master Classification File (MCF)

The U.S. Patent Application Master Classification File contains classification information on all patent applications published by the U.S. Patent and Trademark Office. The U.S Patent Application Master Classification File is available bimonthly (i.e., once every two months, usually by the second week in odd months).

This file is sorted by patent application document number sequence ascending. All of the Primary U.S. Classifications appear first followed by the Secondary U.S. Classifications.


USPatentApplMasterClass.docx


mcfappl.zip


U.S. Patent Grant Master Classification File (MCF)

The U.S. Patent Grant Master Classification File contains classification information on all patent grants issued by the U.S. Patent and Trademark Office. The U.S Patent Grant Master Classification File (MCF) is available bimonthly (i.e., once every two months, usually by the second week in odd months).

  • MCFPAT – This file is sorted first by patent number ascending and second by original “O” U.S. patent classification ascending.
  • MCFCLS – This file is sorted first by U.S. patent classification ascending and second by patent number ascending.

USPatentGrantMasterClass.docx


mcfpat.zip   |   mcfcls.zip


U.S. Manual of Classification File (CTAF)

The U.S. Classification Text Attribute File (CTAF) contains the data from the Manual of Classification excluding notes. Data elements within a variable length record are defined below. The Manual of Classification File (CTAF) is available bimonthly (i.e., once every two months, usually by the second week in odd months).


USManualofClass.docx


ctaf.zip


Index to the U.S. Patent Classification File (a.k.a., U.S. Classification Index File (CLASINDX))

The Index to the U.S. Patent Classification File is based on the system used by the U.S. Patent and Trademark Office to classify patents. It is an alphabetical list of 67,800+ subject headings referring to specific classes and subclasses of the patent classification system. The Index to the U.S. Patent Classification File is available bimonthly (i.e., once every two months, usually by the second week in odd months).


IndextoUSPatentClass.docx


clasindx.zip


U.S. Patent Classification System - Classification Definitions

Explanation of Data.


The U.S. Patent Classification System (USPC) is used to classify patents granted by the U.S. Patent and Trademark Office. The USPC provides for the storage and retrieval of every U.S. patent document that a patent examiner needs to review when examining patent applications.


Please note that the USPC is updated regularly to better categorize patented technologies. As these definitions are updated, all existing U.S. patents granted since 1790 are reclassified to reflect these classification updates.


classdefs.zip



Classification Orders

The Classification Orders are the official record of change for classes within the U.S. Patent Classification System (USPCS). The orders contain information on Abolished and Established classes and subclasses, Indent Changes, Position Changes, and Title Changes. Classification Orders are released to the patent community and to the general public on the first Tuesday of every month.


ClassOrdersIndx.docx


classordersindx.zip



U.S. Patent Classification to International Patent Classification Concordance (a.k.a., USPC to IPC Concordance)

Maps USPC to IPC classes.


USPC2IPCConcordance.docx


uspc2ipcconcordance.zip