Bathroom system
US-12546094-B2 · Feb 10, 2026 · US
using household water
using household water · Cooperative Patent Classification (CPC)
Building, mining, and civil engineering structures.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | E03B2001/045 |
| Official title | {using household water} |
| Display label | using household water |
| Total patents | 41 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2016 | 3 |
| 2017 | 6 |
| 2018 | 2 |
| 2019 | 1 |
| 2020 | 3 |
| 2021 | 2 |
| 2022 | 7 |
| 2023 | 2 |
| 2024 | 6 |
| 2025 | 8 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Occupancy surveillance for plumbing fixtures
US-2025320699-A1 · Oct 16, 2025 · US
Recirculating shower system
US-2025290302-A1 · Sep 18, 2025 · US
Waterway installation structure in a toilet
US-2025283319-A1 · Sep 11, 2025 · US
Systems and methods for point of use water modification
US-12392115-B2 · Aug 19, 2025 · US
Waterway installation structure in a toilet
US-12320108-B2 · Jun 3, 2025 · US
Recirculating shower system
US-12297631-B2 · May 13, 2025 · US
Recirculating shower system
US-2025075475-A1 · Mar 6, 2025 · US
Systems and methods for water re-use
US-12209397-B2 · Jan 28, 2025 · US
Recirculating shower system
US-12180692-B2 · Dec 31, 2024 · US
System and method for recovering and reusing graywater
US-2024410140-A1 · Dec 12, 2024 · US
System and method for recovering and reusing graywater
US-12071747-B2 · Aug 27, 2024 · US
Recirculating Shower System
US-2024151010-A1 · May 9, 2024 · US
Waterway installation structure in a toilet
US-2024093477-A1 · Mar 21, 2024 · US
Recirculating shower system
US-2024018761-A1 · Jan 18, 2024 · US
Bathroom system
US-2023407608-A1 · Dec 21, 2023 · US
Sanitary device having at least one dispenser for a liquid
US-2023183951-A1 · Jun 15, 2023 · US
Systems and methods for managing home appliance water use
US-2022325459-A1 · Oct 13, 2022 · US
Systems and methods for point of use water modification
US-2022315447-A1 · Oct 6, 2022 · US
Systems and methods for point of use water modification
US-2022316191-A1 · Oct 6, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC E03B2001/045?
- CPC E03B2001/045 is the Cooperative Patent Classification code for “using household water.”
- How many patents are filed under CPC E03B2001/045 (using household water)?
- Our database includes 41 publications tagged with this CPC code.
- Is patent activity under CPC E03B2001/045 growing?
- Publication counts under this code: 6 in 2024 vs 8 in 2025 (latest complete years).