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CPC Subgroup
G01R 17/10

AC or DC measuring bridges

Full Title

Measuring arrangements involving comparison with a reference value, e.g. bridge > AC or DC measuring bridges

5 direct subcodes

Child Classifications

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  • G01R 17/12 using comparison of currents, e.g. bridges with differential current output
  • G01R 17/14 with indication of measured value by calibrated null indicator, e.g. percent bridge, tolerance bridge (G01R17/12, G01R17/16 take precedence)
  • G01R 17/16 with discharge tubes or semiconductor devices in one or more arms of the bridge, e.g. voltmeter using a difference amplifier
  • G01R 17/18 with more than four branches

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