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CPC Subgroup
G06F 18/2137

based on criteria of topology preservation, e.g. multidimensional scaling or self-organising maps

Full Title

Pattern recognition > Analysing > Design or setup of recognition systems or techniques; Extraction of features in feature space; Blind source separation > Feature extraction, e.g. by transforming the feature space; Summarisation; Mappings, e.g. subspace methods > based on criteria of topology preservation, e.g. multidimensional scaling or self-organising maps

Description

G06F18/2137 covers feature extraction based on criteria of topology preservation, where the mapping into a lower-dimensional space is chosen so that neighbourhood relations of the original data points are retained. Representative techniques include multidimensional scaling, self-organising maps and related neighbour-embedding methods used to visualise high-dimensional pattern data, including t-SNE-style approaches. Approximation-driven mappings such as principal component analysis belong to G06F18/2135, and sparsity-based criteria to G06F18/2136.

Filing statistics

CPC G06F 18/2137 belongs to the parent subclass G06F, which recorded 2,867,653 patent applications worldwide between 2013 and 2023. Annual filings grew from 154,451 in 2013 to 335,605 in 2023 (+117%), peaking at 367,101 applications in 2021. The most active applicants in class G06 are SAMSUNG ELECTRONICS COMPANY (76,952 applications), IBM (INTERNATIONAL BUSINESS MACHINES CORPORATION) (62,841 applications) and MICROSOFT TECHNOLOGY LICENSING (44,778 applications).

Source: EPO PATSTAT, worldwide filings

1 direct subcode

Child Classifications

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Top Applicants

Top 10 applicants by patent filingsfor class G06, 2013–2023, worldwide · Source: EPO PATSTAT

  1. SAMSUNG ELECTRONICS COMPANY KR 76,952
  2. IBM (INTERNATIONAL BUSINESS MACHINES CORPORATION) US 62,841
  3. MICROSOFT TECHNOLOGY LICENSING US 44,778
  4. GOOGLE US 35,735
  5. INTEL CORPORATION US 32,087
  6. HUAWEI TECHNOLOGIES COMPANY CN 30,572
  7. TENCENT TECHNOLOGY (SHENZHEN) COMPANY 25,023
  8. APPLE US 23,482
  9. SGCC(STATE GRID CORPORATION OF CHINA) 22,548
  10. HUAWEI TECHNOLOGIES COMPANY 20,917