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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.