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CPC Subgroup
G01B 3/50

of limit-gauge type, i.e. "go/no-go" (G01B3/48 takes precedence)

Full Title

Measuring instruments characterised by the use of mechanical techniques > Plug gauges for internal dimensions with engaging surfaces which are at a fixed distance, although they may be preadjustable > of limit-gauge type, i.e. "go/no-go" (G01B3/48 takes precedence)

1 direct subcode

Child Classifications

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  • G01B 3/52 preadjustable for wear or tolerance

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