Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
IPC Subgroup
G05D 11/08

by sensing concentration of mixture, e.g. by measuring pH-value

Introduced: September 1968

Last revised: January 2006

Full Title

Control of flow ratio > Controlling ratio of two or more flows of fluid or fluent material > with auxiliary non-electric power > by sensing concentration of mixture, e.g. by measuring pH-value

Classification Context

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

1 direct subcode

Child Classifications

Navigate with arrow keys, Enter to open

  • G05D 11/1 by sensing moisture of non-aqueous liquids

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