IPC Subgroup
B66B 11/04 Driving gear
Introduced: September 1968
Last revised: January 2006
Full Title
Main component parts of lifts in, or associated with, buildings or other structures > Driving gear
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- HOISTING; LIFTING; HAULING
- Subclass:
- ELEVATORS; ESCALATORS OR MOVING WALKWAYS
Related Keywords
driving gear for LIFT(S)
2 direct subcodes
Child Classifications
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- B66B 11/06 with hoisting rope or cable positively attached to a winding drum
- B66B 11/08 with hoisting rope or cable operated by frictional engagement with a winding drum or sheave
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