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DIFF Subgroup
H02P 7/20

using multi-position switch, e.g. drum, controlling motor circuit by means of relays (H02P7/24, H02P7/30 take precedence)

Introduced: September 1968

Title

Titles differ between systems:

IPC: using multi-position switch, e.g. drum, controlling motor circuit by means of relays

CPC: using multi-position switch, e.g. drum, controlling motor circuit by means of relays (H02P7/24, H02P7/30 take precedence)

Full Title

Full titles differ between systems:

IPC:

Arrangements for regulating or controlling the speed or torque of electric DC motors > for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current > by master control with auxiliary power > using multi-position switch, e.g. drum, controlling motor circuit by means of relays

CPC:

Arrangements for regulating or controlling the speed or torque of electric DC motors > for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current > by master control with auxiliary power > using multi-position switch, e.g. drum, controlling motor circuit by means of relays (H02P7/24, H02P7/30 take precedence)

Additional Content IPC

Using discharge tubes or semiconductor devices Using magnetic devices with controllable degree of saturation, i.e. transductors

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

Top Applicants

Top Applicants (IPC)

Class H02,2013–2023, worldwide · Source: EPO PATSTAT

  1. SGCC(STATE GRID CORPORATION OF CHINA) 54,496
  2. MITSUBISHI ELECTRIC CORPORATION JP 10,495
  3. TOYOTA MOTOR CORPORATION 9,464
  4. GUANGDONG POWER GRID CORPORATION 9,339
  5. ROBERT BOSCH DE 8,226
  6. SIEMENS DE 8,218
  7. DENSO CORPORATION 7,063
  8. MITSUBISHI ELECTRIC CORPORATION 6,619
  9. SAMSUNG ELECTRONICS COMPANY KR 5,826
  10. GREE ELECTRIC APPLIANCES 5,094

Top Applicants (CPC)

Class H02,2013–2023, worldwide · Source: EPO PATSTAT

  1. SGCC(STATE GRID CORPORATION OF CHINA) 24,515
  2. MITSUBISHI ELECTRIC CORPORATION JP 11,346
  3. SIEMENS DE 9,026
  4. ROBERT BOSCH DE 9,005
  5. SAMSUNG ELECTRONICS COMPANY KR 6,729
  6. GUANGDONG POWER GRID CORPORATION 5,740
  7. DENSO CORPORATION JP 5,077
  8. LG ELECTRONICS KR 5,041
  9. LG INNOTEK COMPANY KR 4,442
  10. TOYOTA MOTOR CORPORATION 4,349