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IPC Subgroup
F02B 25/04

Engines having ports both in cylinder head and in cylinder wall near bottom of piston stroke

Introduced: September 1968

Last revised: January 2006

Full Title

Engines characterised by using fresh charge for scavenging cylinders > using unidirectional scavenging > Engines having ports both in cylinder head and in cylinder wall near bottom of piston stroke

Classification Context

Section:
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
Class:
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Subclass:
INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL

1 direct subcode

Child Classifications

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  • F02B 25/06 the cylinder-head ports being controlled by working pistons, e.g. by sleeve-shaped extensions thereof

Top Applicants

Top 10 applicants by patent filingsfor class F02, 2013–2023, worldwide · Source: EPO PATSTAT

  1. TOYOTA MOTOR CORPORATION 8,687
  2. ROBERT BOSCH DE 8,328
  3. FORD GLOBAL TECHNOLOGIES US 7,423
  4. GE (GENERAL ELECTRIC COMPANY) US 5,732
  5. UNITED TECHNOLOGIES CORPORATION (UTC) US 5,592
  6. HYUNDAI MOTOR COMPANY KR 4,699
  7. TOYOTA MOTOR CORPORATION JP 4,541
  8. DENSO CORPORATION 3,711
  9. WEICHAI POWER COMPANY 3,486
  10. SAFRAN AIRCRAFT ENGINES FR 3,249