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IPC Subgroup
G05D 23/2

with sensing elements having variation of electric or magnetic properties with change of temperature

Introduced: September 1968

Last revised: January 2006

Full Title

Control of temperature > characterised by the use of electric means > with sensing elements having variation of electric or magnetic properties with change of temperature

Classification Context

Section:
PHYSICS
Class:
CONTROLLING; REGULATING
Subclass:
SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES

3 direct subcodes

Child Classifications

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  • G05D 23/22 the sensing element being a thermocouple
  • G05D 23/24 the sensing element having a resistance varying with temperature, e.g. thermistor
  • G05D 23/26 the sensing element having a permeability varying with temperature

Top Applicants

Top 10 applicants by patent filingsfor class G05, 2013–2023, worldwide · Source: EPO PATSTAT

  1. SIEMENS DE 4,725
  2. SGCC(STATE GRID CORPORATION OF CHINA) 4,571
  3. FANUC JP 4,233
  4. MITSUBISHI ELECTRIC CORPORATION JP 3,143
  5. FANUC 2,981
  6. ROBERT BOSCH DE 2,813
  7. CHINESE ACADEMY OF SCIENCES 2,500
  8. LG ELECTRONICS KR 2,182
  9. OMRON CORPORATION JP 2,036
  10. SAMSUNG ELECTRONICS COMPANY KR 1,981