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DIFF Subgroup
G01B 3/22

Feeler-pin gauges, e.g. dial gauges (for measuring contours or curvatures G01B5/20)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Feeler-pin gauges, e.g. dial gauges

CPC: Feeler-pin gauges, e.g. dial gauges (for measuring contours or curvatures G01B5/20)

Full Title

Full titles differ between systems:

IPC:

Measuring instruments characterised by the use of mechanical techniques > Feeler-pin gauges, e.g. dial gauges

CPC:

Measuring instruments characterised by the use of mechanical techniques > Feeler-pin gauges, e.g. dial gauges (for measuring contours or curvatures G01B5/20)

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

Child Classifications

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  • G01B 3/24 with open yoke, i.e. calipers IPC+CPC Available in IPC and CPC
  • G01B 3/26 Plug gauges IPC+CPC Available in IPC and CPC
  • G01B 3/28 Depth gauges IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

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

Top Applicants (CPC)

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