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PCE
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DIFF Subgroup
E21F 17/04

Distributing means for power supply in mines

Introduced: September 1968

Title

Titles differ between systems:

IPC: Distributing means for power supply

CPC: Distributing means for power supply in mines

Full Title

Full titles differ between systems:

IPC:

Methods or devices for use in mines or tunnels, not covered elsewhere > Distributing means for power supply

CPC:

Methods or devices for use in mines or tunnels, not covered elsewhere (mine lighting F21, H05B) > Distributing means for power supply in mines

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

3 shared codes have differing titles between IPC and CPC.

Child Classifications

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  • E21F 17/06 Distributing electric power; Cable networks; Conduits for cables (circuit arrangements for supplying or distributing electric power in general H02J) IPC+CPC Available in IPC and CPC
  • E21F 17/08 Distributing hydraulic power; Pipe networks for hydraulic liquid (pipe-line systems in general F17D) IPC+CPC Available in IPC and CPC
  • E21F 17/10 Distributing pneumatic power; Pipe networks for compressed air (pipe-line systems in general F17D) IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class E21,2013–2023, worldwide · Source: EPO PATSTAT

  1. HALLIBURTON ENERGY SERVICES GROUP US 26,607
  2. PETROCHINA COMPANY 14,382
  3. SINOPEC (CHINA PETROCHEMICAL CORPORATION) 10,137
  4. CNPC (CHINA NATIONAL PETROLEUM CORPORATION) 6,517
  5. BAKER HUGHES US 6,269
  6. SCHLUMBERGER TECHNOLOGY US 5,929
  7. SAUDI ARABIAN OIL COMPANY SA 5,880
  8. SOUTHWEST PETROLEUM UNIVERSITY 4,477
  9. CHINA UNIVERSITY OF MINING AND TECHNOLOGY 4,357
  10. SCHLUMBERGER TECHNOLOGY NL 4,219

Top Applicants (CPC)

Class E21,2013–2023, worldwide · Source: EPO PATSTAT

  1. HALLIBURTON ENERGY SERVICES GROUP US 27,652
  2. SAUDI ARABIAN OIL COMPANY SA 7,755
  3. PETROCHINA COMPANY 7,025
  4. BAKER HUGHES US 6,589
  5. SCHLUMBERGER TECHNOLOGY US 6,151
  6. SINOPEC (CHINA PETROCHEMICAL CORPORATION) 4,443
  7. SCHLUMBERGER TECHNOLOGY NL 4,255
  8. CNPC (CHINA NATIONAL PETROLEUM CORPORATION) 3,991
  9. SERVICES PETROLIERS SCHLUMBERGER FR 3,300
  10. SCHLUMBERGER CANADA CA 3,086