IPC Subgroup
B66B 13/14 Control systems or devices
Introduced: September 1968
Last revised: January 2006
Full Title
Doors, gates, or other apparatus controlling access to, or exit from, cages or lift-well landings > Door or gate operation > Control systems or devices
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- HOISTING; LIFTING; HAULING
- Subclass:
- ELEVATORS; ESCALATORS OR MOVING WALKWAYS
Related Keywords
CONTROL(S) systems for lift doors
1 direct subcode
Child Classifications
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- B66B 13/16 Door or gate locking devices controlled or primarily controlled by condition of cage, e.g. movement or position
Top Applicants
Top 10 applicants by patent filingsfor class B66, 2013–2023, worldwide · Source: EPO PATSTAT
- INVENTIO CH 3,843
- OTIS ELEVATOR COMPANY US 3,709
- SGCC(STATE GRID CORPORATION OF CHINA) 2,987
- KONE CORPORATION FI 2,922
- TOSHIBA ELEVATOR COMPANY 2,922
- HITACHI 2,321
- MITSUBISHI ELECTRIC CORPORATION JP 2,287
- MITSUBISHI ELECTRIC CORPORATION 1,870
- HITACHI BUILDING SYSTEMS COMPANY 1,700
- ANHUI HELI COMPANY 1,325