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PCE
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CPC Subgroup
B66B 5/22

by means of linearly-movable wedges (B66B5/24 takes precedence)

Full Title

Applications of checking, fault-correcting, or safety devices in elevators > responsive to abnormal operating conditions > Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well > and applying frictional retarding forces > by means of linearly-movable wedges (B66B5/24 takes precedence)

Top Applicants

Top 10 applicants by patent filingsfor 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