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CPC Subclass Not Allocatable
F15C

FLUID-CIRCUIT ELEMENTS PREDOMINANTLY USED FOR COMPUTING OR CONTROL PURPOSES (transducers F15B5/00, ; fluid dynamics in general F15D; computer comprising fluid elements G06D, G06G; )

Description

Covers fluid-based logic and control systems employing hydraulic or pneumatic circuit elements designed to perform computational, control, or decision-making functions. This includes fluidic logic gates, fluid amplifiers, fluid oscillators, and integrated pneumatic/hydraulic control circuits that process signals or regulate system behavior without electronic components. Distinct from general fluid power transmission (F15B) and standard actuators (F15B, F15D), this class focuses on elements where fluid dynamics itself implements the control logic or signal processing function.

5 direct subcodes

Child Classifications

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  • F15C 4/00 Circuit elements characterised by their special functions
  • F15C 5/00 Manufacture of fluid circuit elements; Manufacture of assemblages of such elements
  • F15C 7/00 Hybrid elements, i.e. circuit elements having features according to groups F15C1/00 and F15C3/00

Top Applicants

Top 10 applicants by patent filingsfor 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