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CPC Subgroup
G01N 23/2251

using incident electron beams, e.g. scanning electron microscopy [SEM]

Full Title

Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 > by measuring secondary emission from the material > using electron or ion > using incident electron beams, e.g. scanning electron microscopy [SEM]

2 direct subcodes

Child Classifications

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  • G01N 23/2252 Measuring emitted X-rays, e.g. electron probe microanalysis [EPMA]
  • G01N 23/2254 Measuring cathodoluminescence

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