DIFF Class Not Allocatable
G99 SUBJECT MATTER NOT OTHERWISE PROVIDED FOR IN THIS SECTION
Description
G99 is a catch-all classification for inventions and technical subject matter in the physics field that do not fit within the established IPC classes G01 through G98. This classification is used when an invention's technical scope extends across multiple physics-related classes or addresses novel technical areas not yet systematically integrated into the IPC framework. Examiners apply G99 only after confirming that more specific classifications (e.g., G01–G98) are inappropriate, ensuring proper patent documentation and retrieval for unexpected or interdisciplinary physics innovations.
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
IPC defines codes here since 2006.
Child Classifications
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- G99Z SUBJECT MATTER NOT OTHERWISE PROVIDED FOR IN THIS SECTION heading since 2006 IPC+CPC Available in IPC and CPC