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Description

E99 is a residual classification within Section E (Fixed Constructions) designed to accommodate inventions and technical disclosures that do not fit into any of the more specific classes (E01–E98) covering building, civil engineering, or structural applications. This class serves as a catch-all category for novel or atypical subject matter related to fixed constructions that lacks a dedicated classification home elsewhere in Section E. Examiners should first conduct thorough searches in established E-section classes before assigning to E99, as this classification is intended only for truly unclassifiable matter within the scope of fixed constructions.

Filing statistics

CPC E99 recorded 4 patent applications worldwide between 2013 and 2023, summed across its 1 subclasses. Annual filings declined from 2 in 2019 to 1 in 2022 (-50%). The most active applicants in class E99 are Oy F Emet Ab (2 applications), CHINA UNIVERSITY OF MINING AND TECHNOLOGY (1 applications) and CHINA UNIVERSITY OF MINING AND TECHNOLOGY (1 applications).

Source: EPO PATSTAT, worldwide filings