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IPC Main Group
G05D 27/00

Simultaneous control of variables covered by two or more of main groups

Introduced: September 1968

Last revised: January 2006

Classification Context

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

Description

G05D27/00 covers the simultaneous control of two or more non-electric variables that individually belong to different main groups of G05D, for example temperature combined with humidity, or flow combined with pressure and level. Typical applications include air-conditioning and climate chambers, chemical and food processing plants, and laundry or dishwashing machines in which several process variables are regulated by one coordinated control scheme. Control of a single variable remains in its own main group, e.g. G05D23/00 for temperature or G05D7/00 for flow.

Filing statistics

IPC G05D 27/00 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

1 direct subcode

Child Classifications

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  • G05D 27/02 characterised by the use of electric means

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