Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Hydraulic and foundation engineering Patent Leaders in 2022 2022

Primary CPC class E02 · Section E

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 913 patents in 2024.peak 9131996: 398 patents19961997: 303 patents1998: 407 patents1999: 447 patents19992000: 429 patents2001: 443 patents2002: 442 patents20022003: 459 patents2004: 388 patents2005: 349 patents20052006: 391 patents2007: 290 patents2008: 293 patents20082009: 345 patents2010: 438 patents2011: 403 patents20112012: 371 patents2013: 530 patents2014: 692 patents20142015: 728 patents2016: 681 patents2017: 735 patents20172018: 678 patents2019: 826 patents2020: 788 patents20202021: 716 patents2022: 741 patents2023: 717 patents20232024: 913 patents2025: 904 patents2025

Top Inventors

Rank ↑ Inventor ↕ Patents ↕ Primary Company ↕
1 Andrew Xiao Liang 9 Built Robotics
2 Noah Austen Ready-Campbell 9 Built Robotics
3 Yuji Fukuda 9 Kubota
#4 Eric T. Sinn 8 Caterpillar
#5 Gaurav Jitendra Kikani 8 Built Robotics
#6 Nathaniel K. Harshman 8 Caterpillar
#7 Shinya Imura 8 Hitachi Construction Machinery Co.
#8 Thomas Marshall Congdon 8 Caterpillar
#9 Douglas C. Serrurier 7 Caterpillar
#10 Eiji Ishibashi 7 Komatsu
#11 Shiho Izumi 7 Hitachi Construction Machinery Co.
#12 Akihiro Kondo 6 Kawasaki
#13 Benjamin J. Kovalick 6 Caterpillar
#14 Ethan M. Tevis 6 Caterpillar
#15 Grant R. Henn 6 John Deere
#16 Isamu Aoki 6 Hitachi Construction Machinery Co.
#17 Koji Hyodo 6 Hitachi Construction Machinery Co.
#18 Michael C. Gentle 6 Caterpillar
#19 Aaron R. Kenkel 5 John Deere
#20 Bruce Raymond Vahling 5 Caterpillar
#21 Craig Christofferson 5 John Deere
#22 David Bruno Parzynski, Jr. 5 Caterpillar
#23 Doug M. Lehmann 5 John Deere
#24 Hidekazu Moriki 5 Hitachi Construction Machinery Co.
#25 Hisami NAKANO 5 Hitachi Construction Machinery Co.
#26 Hiroshi Sakamoto 5 Hitachi
#27 Hiroaki Tanaka 5 Denso
#28 Jason Jura 5 Caterpillar
#29 Kunitsugu Tomita 5 Hitachi Construction Machinery Co.
#30 Michael G. Kean 5 John Deere
#31 Ryota HAMAMOTO 5 Kubota
#32 Satoshi Nakamura 5 Ricoh Company
#33 Takeya IZUMIKAWA 5 Sumitomo Construction Machinery Co.
#34 Takahiro Shimojo 5 Komatsu
#35 Tetsuji Tanaka 5 Sumitomo Wiring Systems
#36 Todd F. Velde 5 John Deere
#37 Yukinori Matsumura 5 Komatsu
#38 Amy K. Jones 4 John Deere
#39 Ammar Idris Kothari 4 Built Robotics
#40 Brett S. Graham 4 John Deere
#41 David L. Cox 4 Caterpillar
#42 Hiroyuki Tsukamoto 4 Sumitomo Construction Machinery Co.
#43 James Alan Emerick 4 Built Robotics
#44 Jack West 4 Tesla
#45 Joonhyun Kim 4 Built Robotics
#46 Jorge Triginer Boixeda 4 Metalogenia Research & Technologies, S.L.
#47 Kazuhisa Takahama 4 Komatsu
#48 Kiwamu Takahashi 4 Hitachi Construction Machinery Tierra Co.
#49 Lance R. Sherlock 4 John Deere
#50 Mihai Mircea Balan 4 Caterpillar
#51 Seiji Saiki 4 Kobelco Construction Machinery Co.
#52 Seth Wilkinson 4 Wilkinson Ecological Design
#53 Yasutaka Tsuruga 4 Hitachi Construction Machinery Co.
#54 Yasuhito Yonezawa 4 Komatsu
#55 Youji Misaki 4 Sumitomo Construction Machinery Co.
#56 Yusuke Suzuki 4 Toyota
#57 Yukihisa Takaoka 4 Komatsu
#58 Akifumi Inamaru 3 Komatsu
#59 Allan P. Henderson 3 Terracon Consultants
#60 Alex R. Vandegrift 3 John Deere
#61 Andrea BIRTELE 3 Thur S.R.L.
#62 Angelo J. Pino, Jr. 3 Cciip
#63 Charles Almy 3 Ojjo
#64 Christopher J. Meyer 3 Solar Turbines Incorporated
#65 Chunnan Wu 3 Sumitomo Heavy Industries
#66 David J. Myers 3 W.L. Gore & Associates Gmbh
#67 David A. Veasy 3 John Deere
#68 Feixiang Lu 3 Beijing Baidu Netcom Science Technology Co.
#69 Fuming Wang 3 Safekey Engineering Technology (Zhengzhou)
#70 Hao Xu 3 Yunda H & Htech (Tianjin) Co.
#71 Hiroshi Horii 3 IBM
#72 Hideyasu Muraoka 3 Kawasaki
#73 Jeffrey K. Berry 3 Caterpillar
#74 Junichi Okada 3 Sumitomo Heavy Industries
#75 Jun Tomita 3 Kubota
#76 Kazuhiro Hashimoto 3 Komatsu
#77 Kazuki Kure 3 Komatsu
#78 Kazushige KUROKAMI 3 Hitachi Construction Machinery Co.
#79 Kazushige Mori 3 Hitachi Construction Machinery Tierra Co.
#80 Kenji Hiraku 3 Hitachi Construction Machinery Co.
#81 Kouji Ishikawa 3 Hitachi Construction Machinery Co.
#82 Koji Shimazaki 3 Hitachi Construction Machinery Co.
#83 Kota Yamaguchi 3 Hitachi
#84 Lucas Allen Bruder 3 Built Robotics
#85 Manabu Edamura 3 Hitachi Construction Machinery Co.
#86 Michael Kollmann 3 Oilquick Deutschland Kg
#87 Michael B. Roska 3 Esco Group
#88 Nathan Bjerke 3 Caterpillar
#89 Phillip J. Kunz 3 Caterpillar
#90 Pradeesh Suganthan 3 Built Robotics
#91 Rammagy Yoeu 3 Caterpillar
#92 Ruigang Yang 3 Baidu Online Network Technology (Beijing) Co.
#93 Ryu NARIKAWA 3 Hitachi Construction Machinery Co.
#94 Sarah Marie Thornton 3 Built Robotics
#95 Sho FUJIWARA 3 Kobelco Construction Machinery Co.
#96 Takeshi Ishii 3 Hitachi Construction Machinery Tierra Co.
#97 Taihei Maehara 3 Hitachi Construction Machinery Tierra Co.
#98 Takashi Nishi 3 Sumitomo Construction Machinery Co.
#99 Takashi Yamamoto 3 Mitsubishi Electric
#100 Toshihiro Kawano 3 Hitachi

Top Companies

Rank ↑ Company ↕ Patents ↕
1 Caterpillar 85
2 Hitachi Construction Machinery Co. 53
3 Komatsu 53
#4 John Deere 39
#5 Kubota 23
#6 Sumitomo Construction Machinery Co. 20
#7 Cnh Industrial America 14
#8 Kobelco Construction Machinery Co. 14
#9 Volvo Construction Equipment Ab 10
#10 Built Robotics 9
#11 Sumitomo Heavy Industries 9
#12 Hitachi Construction Machinery Tierra Co. 8
#13 Kawasaki 7
#14 Clark Equipment 6
#15 Esco Group 6
#16 Unknown 6
#17 Bauer Spezialtiefbau Gmbh 4
#18 Doosan Infracore Co. 4
#19 Ojjo 4
#20 Wilkinson Ecological Design 4
#21 American Piledriving Equipment 3
#22 Bauer Maschinen Gmbh 3
#23 Beijing Baidu Netcom Science Technology Co. 3
#24 Cciip 3
#25 Danfoss Power Solutions Ii Technology A/S 3
#26 Husqvarna Ab 3
#27 Metalogenia Research & Technologies, S.L. 3
#28 Oilquick Deutschland Kg 3
#29 Soletanche Freyssinet 3
#30 Terracon Consultants 3
#31 The Charles Machine Works 3
#32 Thur S.R.L. 3
#33 Zhejiang University 3
#34 Artemis Intelligent Power Limited 2
#35 Black & Decker 2
#36 Dalian University Of Technology 2
#37 Delta Subsea 2
#38 Giken 2
#39 Guangxi Liugong Machinery Co. 2
#40 Guangzhou Construction Engineering Co. 2
#41 Guangzhou Institute Of Building Science Co. 2
#42 Hubbell Incorporated 2
#43 Ihc Holland Ie B.V. 2
#44 Innogy Se 2
#45 Institute Of Geology And Geophysics, Chinese Academy Of Sciences 2
#46 Joy Global Surface Mining 2
#47 Kobe Steel 2
#48 Levee Lock 2
#49 Liebherr-Hydraulikbagger Gmbh 2
#50 Novatron Oy 2
#51 Rcam Technologies 2
#52 Saudi Arabian Oil 2
#53 Ssab Technology Ab 2
#54 Takeuchi Mfg., Co. 2
#55 Tensar International 2
#56 The Toro 2
#57 Vermeer Manufacturing 2
#58 Yanmar Power Technology Co. 2
#59 Zf Friedrichshafen Ag 2
#60 Zhejiang University City College 2
#61 Aalborg Universitet 1
#62 Amosense Co. 1
#63 Array Technologies 1
#64 Asset Guard Products 1
#65 Beijing Hengxiang Hongye Foundation Reinforcement Technology Co. 1
#66 Bernard Mccartney Limited 1
#67 Bright Technologies 1
#68 Case Western Reserve University 1
#69 Cashman Dredging And Marine Contracting, Co. 1
#70 Changzhou University 1
#71 Chengdu University Of Technology 1
#72 China Institute Of Water Resources And Hydropower Research 1
#73 Climate 1
#74 Contech Engineered Solutions 1
#75 Corning Research & Development 1
#76 Daedong 1
#77 Daemo Engineering Co. 1
#78 Daewoo Engineering & Construction Co. 1
#79 Dana Motion Systems Italia S.R.L. 1
#80 Danfoss Power Solutions Gmbh & Co. Ohg 1
#81 Delta Electronics 1
#82 Deme Offshore Be Nv 1
#83 Dimex 1
#84 Elta Systems 1
#85 Emrgy 1
#86 Exposure Illumination Architects 1
#87 Forma Technologies 1
#88 Geopier Foundation Company 1
#89 George Mason University 1
#90 Goliathtech 1
#91 Gripple Limited 1
#92 Guangzhou Automobile Group Co. 1
#93 Gustomsc B.V. 1
#94 Hensley Industries 1
#95 Hexagon Technology Center Gmbh 1
#96 Hiroshima University 1
#97 Holcim Technology 1
#98 Ihi 1
#99 Independence Materials Group 1
#100 Industry-University Cooperation Foundation Hanyang University 1