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IPC Main Group
G05D 7/00

Control of flow

Introduced: September 1968

Last revised: January 2006

Classification Context

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

Filing statistics

IPC G05D 7/00 belongs to the parent subclass G05D, which recorded 251,217 patent applications worldwide between 2013 and 2023. Annual filings grew from 11,275 in 2013 to 22,402 in 2023 (+99%), peaking at 30,053 applications in 2020. The most active applicants in class G05 are SIEMENS (4,725 applications), SGCC(STATE GRID CORPORATION OF CHINA) (4,571 applications) and FANUC (4,233 applications).

Source: EPO PATSTAT, worldwide filings

Additional Content

Limiting references

Level control Control of flow ratio

Application references

Controlling the air quantity in hair drying helmets Controlling flow of media to the human body Controlling flow of gases or vapour in electrostatic separators Control of fluent material in coating devices Flow-control devices in apparatus or devices for dispensing beverages on draught Automatic means for reducing or intermittently interrupting flow for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers Controlling gas flow through gas purifiers Controlling flow of drilling fluid for flushing boreholes Controlling the flow of the obtained fluid to or in wells Controlling by varying flow non-positive-displacement machines or engines Controlling lubrication pressure or quantity Control of coolant flow for cooling machines or engines in general, or for internal-combustion engines Control of gas-turbine working fluid flow , Throttle passages in pipes Controlling air flow rate in air treatment arrangements Controlling of air or gas flow in dryers Controlling the rate of feed or discharge in continuous flow weighing apparatus Control of nuclear power plant by varying flow of coolant

Related Keywords

control of FLOWcontrolling LIQUID(S)

3 direct subcodes

Child Classifications

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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