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IPC Main Group
E03F 3/00

Sewer pipe-line systems

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:
FIXED CONSTRUCTIONS
Class:
WATER SUPPLY; SEWERAGE
Subclass:
SEWERS; CESSPOOLS

Related Keywords

CONDUITS for sewersCULVERTS of sewer pipe-line systemssewer PIPE(S) -line systems

3 direct subcodes

Child Classifications

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  • E03F 3/02 Arrangement of sewer pipe-lines or pipe-line systems
  • E03F 3/04 Pipes or fittings specially adapted to sewers
  • E03F 3/06 Methods of, or installations for, laying sewer pipes

Top Applicants

Top 10 applicants by patent filingsfor class E03, 2013–2023, worldwide · Source: EPO PATSTAT

  1. TOTO 2,957
  2. LIXIL CORPORATION 1,646
  3. XIAMEN RT PLUMBING TECHNOLOGY COMPANY 925
  4. NEOPERL DE 870
  5. GROHE DE 828
  6. PANASONIC INTELLECTUAL PROPERTY 738
  7. WUHAN SHENGYU DRAINAGE SYSTEMS COMPANY 727
  8. GEBERIT INTERNATIONAL CH 613
  9. KOHLER COMPANY US 570
  10. TOTO JP 549