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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

Filing statistics

IPC E03F 3/00 belongs to the parent subclass E03F, which recorded 112,948 patent applications worldwide between 2013 and 2023. Annual filings grew from 3,081 in 2013 to 16,751 in 2023 (+444%), peaking at 17,862 applications in 2020. The most active applicants in class E03 are TOTO (2,957 applications), LIXIL CORPORATION (1,646 applications) and XIAMEN RT PLUMBING TECHNOLOGY COMPANY (925 applications).

Source: EPO PATSTAT, worldwide filings

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