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IPC Subgroup
G01K 5/36

the body being a tubular spring, e.g. Bourdon tube

Introduced: September 1968

Last revised: January 2006

Full Title

Measuring temperature based on the expansion or contraction of a material > the material being a fluid contained in a hollow body having parts which are deformable or displaceable under the pressure developed by the material > the body being a tubular spring, e.g. Bourdon tube

Classification Context

Section:
PHYSICS
Class:
MEASURING; TESTING
Subclass:
MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR

Related Keywords

BOURDON for thermometry

2 direct subcodes

Child Classifications

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Top Applicants

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

  1. SGCC(STATE GRID CORPORATION OF CHINA) 41,447
  2. CHINESE ACADEMY OF SCIENCES 32,952
  3. ROBERT BOSCH DE 16,470
  4. SAMSUNG ELECTRONICS COMPANY KR 10,052
  5. SINOPEC (CHINA PETROCHEMICAL CORPORATION) 9,573
  6. ZHEJIANG UNIVERSITY 9,529
  7. GUANGDONG POWER GRID CORPORATION 8,615
  8. TSINGHUA UNIVERSITY 7,805
  9. HALLIBURTON ENERGY SERVICES GROUP US 7,796
  10. QUALCOMM US 7,171