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CPC Subgroup
G01K 5/70

specially adapted for indicating or recording

Full Title

Measuring temperature based on the expansion or contraction of a material (G01K9/00 takes precedence; giving other than momentary value of temperature G01K3/00) > the material being a solid > constrained so that expansion or contraction causes a deformation of the solid > the solid body being formed of compounded strips or plates, e.g. bimetallic strip > specially adapted for indicating or recording

Filing statistics

CPC G01K 5/70 belongs to the parent subclass G01K, which recorded 73,125 patent applications worldwide between 2013 and 2023. Annual filings grew from 3,524 in 2013 to 7,638 in 2023 (+117%), peaking at 9,657 applications in 2020. The most active applicants in class G01 are CHINESE ACADEMY OF SCIENCES (21,460 applications), ROBERT BOSCH (17,801 applications) and SGCC(STATE GRID CORPORATION OF CHINA) (17,347 applications).

Source: EPO PATSTAT, worldwide filings

1 direct subcode

Child Classifications

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  • G01K 5/72 with electric transmission means for final indication

Top Applicants

Top 10 applicants by patent filingsfor class G01, 2013–2023, worldwide · Source: EPO PATSTAT

  1. CHINESE ACADEMY OF SCIENCES 21,460
  2. ROBERT BOSCH DE 17,801
  3. SGCC(STATE GRID CORPORATION OF CHINA) 17,347
  4. SAMSUNG ELECTRONICS COMPANY KR 13,192
  5. QUALCOMM US 9,900
  6. HALLIBURTON ENERGY SERVICES GROUP US 9,742
  7. PHILIPS ELECTRONICS NL 7,249
  8. MITSUBISHI ELECTRIC CORPORATION JP 6,503
  9. ZHEJIANG UNIVERSITY 6,414
  10. DENSO CORPORATION JP 6,382