Skip to content
Search Classifications
Search for IPC and CPC classification codes or keywords
DIFF Main Group
F15C 1/00

Circuit elements having no moving parts

Introduced: September 1968

Of 14 combined children, 7 exist in both systems.

7 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

Navigate with arrow keys, Enter to open

  • F15C 1/001 CPC only CPC only
  • F15C 1/002 CPC only CPC only
  • F15C 1/003 CPC only CPC only
  • F15C 1/005 CPC only CPC only
  • F15C 1/006 CPC only CPC only
  • F15C 1/007 CPC only CPC only
  • F15C 1/008 CPC only CPC only
  • F15C 1/16 Vortex devices, i.e. devices in which use is made of the pressure drop associated with vortex motion in a fluid IPC+CPC Available in IPC and CPC
  • F15C 1/18 Turbulence devices, i.e. devices in which a controlling stream will cause a laminar flow to become turbulent IPC+CPC Available in IPC and CPC
  • F15C 1/20 Direct-impact devices i.e., devices in which two collinear opposing power streams are impacted IPC+CPC Available in IPC and CPC
  • F15C 1/22 Oscillators since 1974 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class F15,2013–2023, worldwide · Source: EPO PATSTAT

  1. ROBERT BOSCH DE 1,079
  2. SCHAEFFLER TECHNOLOGIES & COMPANY DE 980
  3. SMC CORPORATION JP 737
  4. HITACHI CONSTRUCTION MACHINERY COMPANY JP 674
  5. KYB CORPORATION JP 525
  6. CATERPILLAR US 461
  7. FESTO & COMPANY DE 451
  8. ZHEJIANG UNIVERSITY 448
  9. HITACHI CONSTRUCTION MACHINERY COMPANY 442
  10. XUZHOU HEAVY MACHINERY COMPANY 404

Top Applicants (CPC)

Class F15,2013–2023, worldwide · Source: EPO PATSTAT

  1. ROBERT BOSCH DE 1,281
  2. SMC CORPORATION JP 865
  3. HITACHI CONSTRUCTION MACHINERY COMPANY JP 814
  4. KYB CORPORATION JP 584
  5. SCHAEFFLER TECHNOLOGIES & COMPANY DE 536
  6. CATERPILLAR US 532
  7. FESTO & COMPANY DE 486
  8. JOHN DEERE US 419
  9. KAWASAKI HEAVY IND JP 368
  10. HAMILTON SUNDSTRAND US 368