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Classification Systems

Classification systems to identify products, establishments, or processes throughout the supply chain. Classification system information can be used to find industry statistics (market size, funding, patents, publications, etc.)

To identify U.S. firms and products:
  • NAICS: North American Industrial Classification System
  • SIC: Standard Industrial Classification System: predates NAICS, but still used in some sources
To identify products and countries in international trade:
  • Standard International Trade Classification (SITC): UN COMTRADE is the main resource using this system
  • Harmonized System (HS): global, six-digit product classification system
  • Harmonized Tariff System (HTS): administered by the U.S. International Trade Commission to measure U.S. imports
  • Schedule B Codes: administered by the U.S. Census Bureau to measure U.S. exports (similar to HTS)
  • USITC: U.S. international trade data resource or can use to convert between the classification systems
  • Trade Stats Express: U.S. international trade data resource
To identify patents and firms with patents:

International Patent Classification (IPC) System: version 2009.01
European Patent Office Class (EPO): Class Y01N: Nanotechnology
U.S. Patent Classification (USPTO): Class 977: Nanotechnology: Class established in 2004
Japanese Patent and Trademark Office (JPTO): Class ZNM: Nano-technology application technology
Chinese State Intellectual Property Office (SIPO)