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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.

Filing statistics

CPC G99 recorded 36 patent applications worldwide between 2013 and 2023, summed across its 1 subclasses. Annual filings grew from 1 in 2014 to 1 in 2023 (+0%), peaking at 11 applications in 2020. The most active applicants in class G99 are SIROIS, CHARLES (3 applications), DORRINGTON, ADRIAN, ANDREW (3 applications) and HAZAMA MOTOKO (2 applications).

Source: EPO PATSTAT, worldwide filings