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DIFF Subgroup
B66B 1/28

electrical (detecting excessive speed B66B5/04 )

Introduced: September 1968

Title

Titles differ between systems:

IPC: electrical

CPC: electrical (detecting excessive speed B66B5/04 )

Full Title

Full titles differ between systems:

IPC:

Control systems of elevators in general > Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration > electrical

CPC:

Control systems of elevators in general (safety devices B66B5/00; controlling door or gate operation B66B13/00; systems of general application G05) > Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration > electrical (detecting excessive speed B66B5/04 )

Of 3 combined children, 2 exist in both systems.

1 codes are CPC-only extensions.

Child Classifications

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  • B66B 1/285 CPC only CPC only
  • B66B 1/32 effective on braking devices IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class B66,2013–2023, worldwide · Source: EPO PATSTAT

  1. INVENTIO CH 3,843
  2. OTIS ELEVATOR COMPANY US 3,709
  3. SGCC(STATE GRID CORPORATION OF CHINA) 2,987
  4. KONE CORPORATION FI 2,922
  5. TOSHIBA ELEVATOR COMPANY 2,922
  6. HITACHI 2,321
  7. MITSUBISHI ELECTRIC CORPORATION JP 2,287
  8. MITSUBISHI ELECTRIC CORPORATION 1,870
  9. HITACHI BUILDING SYSTEMS COMPANY 1,700
  10. ANHUI HELI COMPANY 1,325

Top Applicants (CPC)

Class B66,2013–2023, worldwide · Source: EPO PATSTAT

  1. INVENTIO CH 3,939
  2. OTIS ELEVATOR COMPANY US 3,810
  3. KONE CORPORATION FI 3,008
  4. MITSUBISHI ELECTRIC CORPORATION JP 2,333
  5. MITSUBISHI ELECTRIC CORPORATION 1,254
  6. HITACHI 1,195
  7. OTIS ELEVATOR COMPANY 1,065
  8. SGCC(STATE GRID CORPORATION OF CHINA) 961
  9. INVENTIO 828
  10. CROWN EQUIPMENT CORPORATION US 828