DIFF Class Not Allocatable
A99 SUBJECT MATTER NOT OTHERWISE PROVIDED FOR IN THIS SECTION
Description
A99 serves as a residual classification for inventions and subject matter related to human necessities that do not fit within the more specific classes of Section A (A01–A98). This class captures technologies, products, and methods addressing basic human needs—such as food, agriculture, clothing, personal care, or medical applications—that fall outside established technical boundaries. A99 is typically used only when no more precise classification within Section A applies, making it essential for managing edge cases and emerging technologies in the human necessities domain.
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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- A99Z SUBJECT MATTER NOT OTHERWISE PROVIDED FOR IN THIS SECTION heading since 2006 IPC+CPC Available in IPC and CPC