Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
IPC Subgroup
E03D 11/1

Bowls with closure elements provided between bottom or outlet and the outlet pipe; Bowls with pivotally supported inserts

Introduced: September 1968

Last revised: January 2006

Full Title

Other component parts of water-closets > Water-closet bowls > Bowls with closure elements provided between bottom or outlet and the outlet pipe; Bowls with pivotally supported inserts

Classification Context

Section:
FIXED CONSTRUCTIONS
Class:
WATER SUPPLY; SEWERAGE
Subclass:
WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR

Filing statistics

IPC E03D 11/1 belongs to the parent subclass E03D, which recorded 48,004 patent applications worldwide between 2013 and 2023. Annual filings grew from 3,300 in 2013 to 3,633 in 2023 (+10%), peaking at 5,771 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

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