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IPC Main Group
G01M 3/00

Investigating fluid tightness of structures

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:
PHYSICS
Class:
MEASURING; TESTING
Subclass:
TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR

Additional Content

Leakage-indicating devices for large containers Preventing, monitoring or locating loss in the pipe-line

Related Keywords

testing fluid-tightness of CONTAINER(S)testing FLUID(S) tightnessdetecting LEAKStesting fluid-tightness of heat RADIATORS

3 direct subcodes

Child Classifications

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  • G01M 3/38 by using light
  • G01M 3/4 by using electric means, e.g. by observing electric discharges

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