How does the hierarchical application of Notes work in CPC schemes?

The hierarchical application of Notes in CPC schemes is an important aspect of understanding their scope and impact. The MPEP 905.01(a)(2) states:

“For example, a note after a class title applies to the entire class. A note after a subclass title applies only to the subclass, a note after a main group applies only to the main group, etc.”

This hierarchical application means that:

• A note at a higher level (e.g., class) affects all lower levels within that class
• Notes at lower levels (e.g., subgroup) only apply to that specific level and its subordinate levels
• The scope of a note’s application is limited to its placement and everything below it in the hierarchy

Understanding this hierarchical structure is crucial for correctly interpreting and applying CPC classifications.

To learn more:

• CPC Hierarchy
• Classification Notes
• Patent Classification