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DIFF Subgroup
G05F 3/30

Regulators using the difference between the base-emitter voltages of two bipolar transistors operating at different current densities (G05F3/26 takes precedence)

Introduced: January 1985

Title

Titles differ between systems:

IPC: Regulators using the difference between the base-emitter voltages of two bipolar transistors operating at different current densities

CPC: Regulators using the difference between the base-emitter voltages of two bipolar transistors operating at different current densities (G05F3/26 takes precedence)

Full Title

Full titles differ between systems:

IPC:

Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties > Regulating voltage or current > wherein the variable is DC > using uncontrolled devices with non-linear characteristics > being semiconductor devices > using diode-transistor combinations > Regulators using the difference between the base-emitter voltages of two bipolar transistors operating at different current densities

CPC:

Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties > Regulating voltage or current > wherein the variable is DC > using uncontrolled devices with non-linear characteristics > being semiconductor devices > using diode- transistor combinations (G05F3/18 takes precedence) > Regulators using the difference between the base-emitter voltages of two bipolar transistors operating at different current densities (G05F3/26 takes precedence)

No child classifications to compare. This is a leaf node in both IPC and CPC.

Top Applicants

Top Applicants (IPC)

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

Top Applicants (CPC)

Class G05,2013–2023, worldwide · Source: EPO PATSTAT

  1. FANUC JP 6,367
  2. SIEMENS DE 5,963
  3. FANUC 4,535
  4. MITSUBISHI ELECTRIC CORPORATION JP 4,201
  5. ROBERT BOSCH DE 4,010
  6. LG ELECTRONICS KR 3,802
  7. SAMSUNG ELECTRONICS COMPANY KR 3,143
  8. FORD GLOBAL TECHNOLOGIES US 2,889
  9. TOYOTA MOTOR CORPORATION 2,778
  10. OMRON CORPORATION JP 2,743