The number of international patent families (IPFs) applications in the wastewater sector has been in an upward trend since 1992. From 2017 to 2021, the number of wastewater IPFs registered reached applications, from which more than half were related to tertiary wastewater treatment.
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European Patent Office. (July 17, 2024). Number of wastewater treatment applications of international patent families (IPFs) worldwide from 1992 to 2021, by technology [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 28, 2026, from /statistics/1605822/number-ipfs-wastewater-treatment-worldwide-by-technology/
European Patent Office. "Number of wastewater treatment applications of international patent families (IPFs) worldwide from 1992 to 2021, by technology." Chart. July 17, 2024. ÌÇÐÄÆƽâ°æ. Accessed July 28, 2026. /statistics/1605822/number-ipfs-wastewater-treatment-worldwide-by-technology/
European Patent Office. (2024). Number of wastewater treatment applications of international patent families (IPFs) worldwide from 1992 to 2021, by technology. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 28, 2026. /statistics/1605822/number-ipfs-wastewater-treatment-worldwide-by-technology/
European Patent Office. "Number of Wastewater Treatment Applications of International Patent Families (Ipfs) Worldwide from 1992 to 2021, by Technology." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 17 Jul 2024, /statistics/1605822/number-ipfs-wastewater-treatment-worldwide-by-technology/
European Patent Office, Number of wastewater treatment applications of international patent families (IPFs) worldwide from 1992 to 2021, by technology ÌÇÐÄÆƽâ°æ, /statistics/1605822/number-ipfs-wastewater-treatment-worldwide-by-technology/ (last visited July 28, 2026)
Number of wastewater treatment applications of international patent families (IPFs) worldwide from 1992 to 2021, by technology [Graph], European Patent Office, July 17, 2024. [Online]. Available: /statistics/1605822/number-ipfs-wastewater-treatment-worldwide-by-technology/
