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PCE
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CPC Subgroup
B66D 1/24

for varying speed or reversing direction of rotation of drums or barrels

Full Title

Rope, cable, or chain winding mechanisms; Capstans (portable or mobile lifting or hauling appliances B66D3/00) > Driving gear > Power transmissions between power sources and drums or barrels > for varying speed or reversing direction of rotation of drums or barrels

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