What additional classification systems should patent examiners consider besides CPC?
While the Cooperative Patent Classification (CPC) system is the primary search tool, patent examiners should also consider other classification systems. The MPEP 904.02(a) mentions:
“In addition to CPC, there are some other classification tools available such as the International Patent Classification (IPC) and the United States Patent Classification (USPC) system.”
Examiners should utilize these additional systems to ensure a comprehensive search:
- International Patent Classification (IPC)
- United States Patent Classification (USPC)
- Any other relevant specialized classification systems
Using multiple classification systems can help identify relevant prior art that might be missed by relying solely on CPC.
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