Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Technologies › Water treatment

Water treatment Patent Leaders in 2018 2018

Primary CPC class C02 · Section C

Rankings count each patent once by its primary Cooperative Patent Classification. All-time pages aggregate the full database; year pages use patent grant year.

Recent years: 2016201720182019202020212022202320242025

Patents per Year

Patents granted per year, 1996 to 2025Bar chart with a peak of 769 patents in 2020.peak 7691996: 450 patents19961997: 414 patents1998: 443 patents1999: 509 patents19992000: 506 patents2001: 546 patents2002: 487 patents20022003: 422 patents2004: 391 patents2005: 343 patents20052006: 340 patents2007: 392 patents2008: 390 patents20082009: 345 patents2010: 482 patents2011: 407 patents20112012: 455 patents2013: 503 patents2014: 505 patents20142015: 532 patents2016: 541 patents2017: 660 patents20172018: 687 patents2019: 767 patents2020: 769 patents20202021: 682 patents2022: 656 patents2023: 626 patents20232024: 630 patents2025: 676 patents2025

Top Inventors

Rank ↑ Inventor ↕ Patents ↕ Primary Company ↕
1 Hideo Suzuki 9 Yamaha
2 Shigeru Yoshioka 8 Mitsubishi Heavy Industries Engineering
3 Hiroshi Nakashoji 7 Mitsubishi Electric
#4 Hideaki Sakurai 7 Mitsubishi Materials
#5 Joseph A. King 7 King Technology
#6 Nobuyuki Ukai 7 Mitsubishi Electric
#7 Susumu Okino 7 Mitsubishi Electric
#8 Masayuki Eda 6 Mitsubishi Electric
#9 Ryuji Yoshiyama 6 Mitsubishi Electric
#10 Gaku Oinuma 5 Mitsubishi Electric
#11 Maximus G. St. John 5 Gradiant
#12 Prakash Narayan Govindan 5 Gradiant
#13 Steven Lam 5 Gradiant
#14 Victor Keasler 5 Ecolab Usa
#15 Yasutaka Inanaga 5 Mitsubishi Electric
#16 Akira Sasaki 4 Hitachi
#17 David Durakovich 4 Buckeye Brine
#18 David D. McSherry 4 Ecolab Usa
#19 David Nicholas 4 Earth Science Laboratories
#20 Donald Dalland 4 King Technology
#21 Freddie L. Singleton 4 Dow Global Technologies
#22 Guanghao Chen 4 Hong Kong University Of Science And Technology
#23 Henry Ross Cheu 4 Buckeye Brine
#24 Ho Kwong Chui 4 Hong Kong University Of Science And Technology
#25 Jeffrey D. Johnson 4 King Technology
#26 Junzhong Li 4 Ecolab Usa
#27 Kazuhiko Noto 4 Hitachi Plant Engineering & Construction Co.
#28 Kotaro Kitamura 4 Hitachi
#29 Masakazu Taki 4 Mitsubishi Electric
#30 Monty Shell 4 Buckeye Brine
#31 Othman Charles Sadeq Al Hamouz 4 KFUPM
#32 Reid Henry Bowman 4 Earth Science Laboratories
#33 Renato De Paula 4 Ecolab Usa
#34 Richard Staub 4 Ecolab Usa
#35 Robert J. Ryther 4 Ecolab Usa
#36 Scott Harlan 4 Buckeye Brine
#37 Steve Mobley 4 Buckeye Brine
#38 Todd Schlauch 4 Buckeye Brine
#39 Tullio Servida 4 Idropan Dell'Orto Depuratori S.R.L.
#40 William Dawson 4 Buckeye Brine
#41 Yasunori Sekine 4 Hitachi
#42 Aamir Abbas 3 KFUPM
#43 Adrian J. Denvir 3 Nch
#44 Aimin Li 3 Nanjing University
#45 Alexander Dobrinsky 3 Sensor Electronic Technology
#46 Basim Ahmed Abussaud 3 KFUPM
#47 Brandon Herdt 3 Ecolab Usa
#48 Charles Bott 3 Hampton Roads Sanitation District
#49 David F. Vela 3 Nch
#50 Frank Schubert 3 Evonik Degussa Gmbh
#51 Jason Holt 3 Heliotrope Technologies
#52 John Reid 3 Cameron Systems (Ireland) Limited
#53 Lyle Enderson 3 King Technology
#54 Masaya Nishimura 3 Daikin Industries
#55 Michael Shur 3 Sensor Electronic Technology
#56 Michael Skovby 3 Omya International Ag
#57 Monique Bissen 3 Riprup Company S.A.
#58 Norihisa Mino 3 Sumitomo Electric Industries
#59 Paul Freeberg 3 King Technology
#60 Remigijus Gaska 3 Sensor Electronic Technology
#61 Saulius Smetona 3 Sensor Electronic Technology
#62 Sachiko Yamaguchi 3 Daikin Industries
#63 Stephen Temple 3 Xaar Technology Limited
#64 Terry Goeman 3 King Technology
#65 Timothy James Bettles 3 Sensor Electronic Technology
#66 Tomoki Saitou 3 Daikin Industries
#67 Tsunahiro Ohdou 3 Daikin Industries
#68 Yasunobu Okajima 3 Kubota
#69 Yeli Jiang 3 Nanjing University
#70 Abdelkader Gaid 2 Veolia Water Solutions & Technologies Support
#71 Akiyoshi Edagawa 2 Panasonic
#72 Akira Taomoto 2 Panasonic
#73 Alain DuFour 2 Rohm And Haas
#74 Allen R. Siedle 2 3M
#75 Amana Jemal Kedir 2 KFUPM
#76 Amjad B. Khalil 2 KFUPM
#77 Anthony L. Powell 2 1934612 Ontario
#78 Anuj K Saha 2 Roy F. Weston
#79 Anthony G. Sommese 2 Nalco Chemical
#80 Armin R. Volkel 2 Palo Alto Research Center Incorporated
#81 Atsushi Ono 2 Murata Manufacturing Co.
#82 Bassam Shafiq Tawabini 2 KFUPM
#83 Bernard F. Duesel, Jr. 2 Heartland Ag Tech
#84 Bernhard Wett 2 D.C. Water And Sewer Authority
#85 Bruce D. Burrows 2 Burrows Golf
#86 Brian E. Butters 2 1934612 Ontario
#87 Carolyn R. Kistner 2 —
#88 Charles D. Blumenschein 2 Veolia Water Solutions & Technologies Support
#89 Christopher M. Borchard 2 —
#90 Charles A. Borchard 2 —
#91 Chad L. Felch 2 Siemens Energy
#92 Christopher M. Kareis 2 Eagle Us 2
#93 Chang-Ching Lin 2 Holy Stone Enierprise Co.
#94 Chendong Shuang 2 Nanjing University
#95 Changming Wang 2 Nanjing University
#96 Corey M. Simnioniw 2 Medora Environmental
#97 Craig Clerkin 2 Heartland Ag Tech
#98 David Deloyd Anderson 2 Energy Recovery
#99 David A. Meekhof 2 Access Business Group International
#100 Di Wu 2 Changzhou University

Top Companies

Rank ↑ Company ↕ Patents ↕
1 KFUPM 15
2 Ecolab Usa 14
3 Unknown 12
#4 Mitsubishi Electric 11
#5 Nanjing University 7
#6 GE 7
#7 Panasonic 7
#8 Veolia Water Solutions & Technologies Support 6
#9 Evoqua Water Technologies 5
#10 King Technology 5
#11 3M 4
#12 Buckeye Brine 4
#13 Dow Global Technologies 4
#14 Earth Science Laboratories 4
#15 Hitachi 4
#16 Idropan Dell'Orto Depuratori S.R.L. 4
#17 Nch 4
#18 Omya International Ag 4
#19 Hong Kong University Of Science And Technology 4
#20 Samsung 4
#21 Daikin Industries 3
#22 Degremont 3
#23 Doosan Heavy Industries & Construction Co. 3
#24 Eagle Us 2 3
#25 Gradiant 3
#26 Hampton Roads Sanitation District 3
#27 Industrie De Nora S.P.A. 3
#28 Korea Institute Of Science And Technology 3
#29 Kubota 3
#30 Kuraray Co. 3
#31 MIT 3
#32 Morningside Venture Investments Limited 3
#33 Ovivo 3
#34 Psmg 3
#35 Sensor Electronic Technology 3
#36 University Of South Florida 3
#37 Chevron 3
#38 ExxonMobil 3
#39 IBM 3
#40 1934612 Ontario 2
#41 Atlantium Technologies 2
#42 Avantech 2
#43 Basf Se 2
#44 Bl Technologies 2
#45 Bonvi Water 2
#46 Brita Lp 2
#47 Chemtreat 2
#48 Clear Cove Systems 2
#49 Council Of Scientific And Industrial Research 2
#50 Custom Molded Products 2
#51 D.C. Water And Sewer Authority 2
#52 Ds Services Of America 2
#53 Electrophor 2
#54 Energy Recovery 2
#55 Enviro Water Minerals Company 2
#56 Etec 2
#57 Evonik Degussa Gmbh 2
#58 Fujifilm 2
#59 Haier Us Appliance Solutions 2
#60 Helen Of Troy Limited 2
#61 Kabushiki Kaisha Toshiba 2
#62 King Abdullah University Of Science And Technology 2
#63 Korea Institute Of Energy Research 2
#64 Liberty Evans 2
#65 Lvd Aquisition 2
#66 Medora Environmental 2
#67 Mitsubishi Heavy Industries Engineering 2
#68 Murtech 2
#69 Orege 2
#70 Palo Alto Research Center Incorporated 2
#71 Phillips Petroleum 2
#72 Postech Academy-Industry Foundation 2
#73 Premier Magnesia 2
#74 Rohm And Haas 2
#75 Siemens Energy 2
#76 Tersano 2
#77 University Of Texas System 2
#78 Tongji University 2
#79 Trojan Technologies 2
#80 Unlimited Water Solutions 2
#81 U.S. Environmental Protection Agency 2
#82 Xi'An Jiaotong University 2
#83 Xylem Ip Holdings 2
#84 Yara International Asa 2
#85 Zero E Technologies 2
#86 Zodiac Group Australia Pty 2
#87 Zodiac Pool Systems 2
#88 Access Business Group International 1
#89 Advanced Diamond Technologies 1
#90 Airbus Operations Limited 1
#91 Amperage Energy 1
#92 Amsa 1
#93 Anaergia 1
#94 Anschutz Exploration 1
#95 Aquaback Technologies 1
#96 Aquaconsult Anlagenbau Gmbh 1
#97 Arcadis Corporate Services 1
#98 Arch Chemicals 1
#99 Archer-Daniels-Midland 1
#100 Arizona Board Of Regents For And On Behalf Of Arizona State University 1