SUBJECT MATTER NOT OTHERWISE PROVIDED FOR IN THIS SECTION

Description

G99Z is a residual classification for physics-related inventions and technologies that do not fit within the more specific physics subclasses (G01–G98) of IPC Section G. This catch-all category captures novel or emerging physics applications, experimental apparatus, or interdisciplinary technologies where the primary technical character is physics-based but lacks a clearly defined home in the established classification scheme. Patents classified here typically represent edge cases, combinations of technologies, or genuinely new fields that predate formal classification development.

Filing statistics

CPC subclass G99Z recorded 36 patent applications worldwide between 2013 and 2023. 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