E03D WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
Description
E03D covers water-closets, urinals, and associated flushing mechanisms that control water discharge for sanitary purposes. This subclass includes the structural design of toilet bowls and urinal fixtures, along with the specialized valves and control systems that regulate water flow during the flush cycle. Patents in this area typically address innovations in valve actuation (mechanical, pneumatic, or electronic), water efficiency mechanisms, and the integration of flushing hardware with sanitary fixtures themselves.
Filing statistics
CPC subclass E03D recorded 22,319 patent applications worldwide between 2013 and 2023. Annual filings grew from 1,412 in 2013 to 1,459 in 2023 (+3%), peaking at 2,737 applications in 2018. The most active applicants in class E03 are NEOPERL (934 applications), GROHE (870 applications) and TOTO (646 applications).
Source: EPO PATSTAT, worldwide filings
8 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- E03D 1/00 Water flushing devices with cisterns
- E03D 11/00 Other component parts of water-closets (pipe-joints or couplings in general F16L )
- E03D 13/00 Urinals (without flushing devices A47K11/00 )
- E03D 2201/00 Details and methods of use for water closets and urinals not otherwise provided for
- E03D 3/00 Flushing devices operated by pressure of the water supply system
- E03D 5/00 Special constructions of flushing devices (in motor vehicles or trailers B60R15/00; in railway carriages B61D35/00; in ships B63B29/14; in aircraft B64D11/02),
- E03D 7/00 Wheeled lavatories (wheeled closets without flushing A47K11/00; construction of land vehicles B62)
- E03D 9/00 Sanitary or other accessories for lavatories (hand tools for cleaning the toilet bowl A47K11/10; seats or covers for closets A47K13/00; body supports, other than seats for closets A47K17/02; devices for preventing contamination of drinking-water pipes E03C1/10 )
Top Applicants
Top 10 applicants by patent filingsfor class E03, 2013–2023, worldwide · Source: EPO PATSTAT
- NEOPERL DE 934
- GROHE DE 870
- TOTO 646
- GEBERIT INTERNATIONAL CH 629
- KOHLER COMPANY US 621
- TOTO JP 590
- LIXIL CORPORATION JP 429
- AS AMERICA US 324
- HANSGROHE SE DE 314
- LIXIL CORPORATION 307