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CPC Subgroup
G01C 17/10

Comparing observed direction with north indication

Full Title

Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes (using gyroscopic effect G01C19/00) > Magnetic compasses > with north-seeking magnetic elements, e.g. needles > Comparing observed direction with north indication

3 direct subcodes

Child Classifications

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  • G01C 17/12 by sighting means, e.g. for surveyors' compasses
  • G01C 17/14 by reference marks, e.g. for ships' compasses
  • G01C 17/16 by clinometers, e.g. for determining dip or strike of geological strata

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