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IPC Subgroup
G01T 1/4

Stabilisation of spectrometers

Introduced: July 1974

Last revised: January 2006

Full Title

Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation > Measuring spectral distribution of X-rays or of nuclear radiation > Stabilisation of spectrometers

Classification Context

Section:
PHYSICS
Class:
MEASURING; TESTING
Subclass:
MEASUREMENT OF NUCLEAR OR X-RADIATION

Filing statistics

IPC G01T 1/4 belongs to the parent subclass G01T, which recorded 38,118 patent applications worldwide between 2013 and 2023. Annual filings declined from 3,303 in 2013 to 3,275 in 2023 (-1%), peaking at 3,821 applications in 2019. The most active applicants in class G01 are SGCC(STATE GRID CORPORATION OF CHINA) (41,447 applications), CHINESE ACADEMY OF SCIENCES (32,952 applications) and ROBERT BOSCH (16,470 applications).

Source: EPO PATSTAT, worldwide filings

Top Applicants

Top 10 applicants by patent filingsfor 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