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IPC Main Group
G01R 13/00

Arrangements for displaying electric variables or waveforms

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:
PHYSICS
Class:
MEASURING; TESTING
Subclass:
MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES

Related Keywords

DISPLAYING of electric variables

7 direct subcodes

Child Classifications

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  • G01R 13/02 for displaying measured electric variables in digital form
  • G01R 13/36 using length of glow discharge, e.g. glowlight oscilloscopes
  • G01R 13/38 using the steady or oscillatory displacement of a light beam by an electromechanical measuring system
  • G01R 13/4 using modulation of a light beam otherwise than by mechanical displacement, e.g. by Kerr effect
  • G01R 13/42 Instruments using length of spark discharge, e.g. by measuring maximum separation of electrodes to produce spark

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