Wastewater and sludge treatment has been by far the main field in water technology innovations. From 1992 to 2021, almost half of the water tech-related international patent families (IPFs) were in this field. The second most popular field was efficient water utilization with 3,311 IPFs registered.
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European Patent Office. (July 17, 2024). Number of water technology-related applications of international patent families (IPFs) worldwide from 1992 to 2021, by field [Graph]. In Statista. Retrieved July 20, 2025, from https://www.statista.com/statistics/1600826/number-ipfs-water-technology-worldwide-by-field/
European Patent Office. "Number of water technology-related applications of international patent families (IPFs) worldwide from 1992 to 2021, by field." Chart. July 17, 2024. Statista. Accessed July 20, 2025. https://www.statista.com/statistics/1600826/number-ipfs-water-technology-worldwide-by-field/
European Patent Office. (2024). Number of water technology-related applications of international patent families (IPFs) worldwide from 1992 to 2021, by field. Statista. Statista Inc.. Accessed: July 20, 2025. https://www.statista.com/statistics/1600826/number-ipfs-water-technology-worldwide-by-field/
European Patent Office. "Number of Water Technology-related Applications of International Patent Families (Ipfs) Worldwide from 1992 to 2021, by Field." Statista, Statista Inc., 17 Jul 2024, https://www.statista.com/statistics/1600826/number-ipfs-water-technology-worldwide-by-field/
European Patent Office, Number of water technology-related applications of international patent families (IPFs) worldwide from 1992 to 2021, by field Statista, https://www.statista.com/statistics/1600826/number-ipfs-water-technology-worldwide-by-field/ (last visited July 20, 2025)
Number of water technology-related applications of international patent families (IPFs) worldwide from 1992 to 2021, by field [Graph], European Patent Office, July 17, 2024. [Online]. Available: https://www.statista.com/statistics/1600826/number-ipfs-water-technology-worldwide-by-field/
