Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Hydraulic and foundation engineering Patent Leaders in 2024 2024

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 Seiji Saiki 12 Kobelco Construction Machinery Co.
2 Yoichiro Yamazaki 12 Kobelco Construction Machinery Co.
3 Yuji Fukuda 12 Kubota
#4 Shinya Imura 11 Hitachi Construction Machinery Co.
#5 Shiho Izumi 11 Hitachi Construction Machinery Co.
#6 Douglas C. Serrurier 9 Caterpillar
#7 Hitoshi Sasaki 8 Kobelco Construction Machinery Co.
#8 Kenjiro Shimada 8 Komatsu
#9 Michael G. Kean 8 John Deere
#10 Ryota HAMAMOTO 8 Kubota
#11 Tomoki KONDA 8 Komatsu
#12 Yasutaka Tsuruga 8 Hitachi Construction Machinery Co.
#13 Akihiro Narazaki 7 Hitachi Construction Machinery Co.
#14 Giovanni A. Wuisan 7 John Deere
#15 Hiroaki Tanaka 7 Denso
#16 Kenji Hiraku 7 Hitachi Construction Machinery Co.
#17 Masatoshi Hoshino 7 Hitachi Construction Machinery Co.
#18 Noah Austen Ready-Campbell 7 Built Robotics
#19 Seiji Hijikata 7 Hitachi Construction Machinery Co.
#20 Andrew Xiao Liang 6 Built Robotics
#21 Eric T. Sinn 6 Caterpillar
#22 Hiroshi Horii 6 IBM
#23 Hidekazu Moriki 6 Hitachi Construction Machinery Co.
#24 Hiroshi Sakamoto 6 Hitachi
#25 Kohei NAGAO 6 Kubota
#26 Masanori Aizawa 6 Toyo Seikan Co.
#27 Nathan Bjerke 6 Caterpillar
#28 Yukihisa Takaoka 6 Komatsu
#29 Akihiro Kondo 5 Kawasaki
#30 Gaurav Jitendra Kikani 5 Built Robotics
#31 Hideyasu Muraoka 5 Kawasaki
#32 Hiroyuki Yamada 5 Hitachi
#33 Jason Carlson 5 Great Plains Manufacturing
#34 Jason Jura 5 Caterpillar
#35 Jeff Welsh 5 Great Plains Manufacturing
#36 John M. Relph 5 Great Plains Manufacturing
#37 Kazuhiro Hatake 5 Komatsu
#38 Matthew Shobe 5 Great Plains Manufacturing
#39 Michael C. Gentle 5 Caterpillar
#40 Takaaki CHIBA 5 Hitachi Construction Machinery Co.
#41 Takumi Itoh 5 Sumitomo Heavy Industries
#42 Teppei SAITOH 5 Hitachi Construction Machinery Co.
#43 Yoshiyuki TODE 5 Kawasaki
#44 Yusuke Sano 5 Sumitomo Heavy Industries
#45 Chunnan Wu 4 Sumitomo Heavy Industries
#46 Corey Michael Wells 4 Caterpillar
#47 Hiroaki Nakagawa 4 Kubota
#48 Hideki Nakajima 4 Caterpillar
#49 Hisami NAKANO 4 Hitachi Construction Machinery Co.
#50 Koichi KIYASU 4 Caterpillar
#51 Koji Yamashita 4 Mitsubishi Electric
#52 Masaki Nukii 4 Hitachi Construction Machinery Co.
#53 Masaru ONODERA 4 Sumitomo Heavy Industries
#54 Masaki Otani 4 Kobelco Construction Machinery Co.
#55 Naoki Hagiwara 4 Hitachi Construction Machinery Co.
#56 Naoki Hayakawa 4 Hitachi Construction Machinery Co.
#57 Ryu NARIKAWA 4 Hitachi Construction Machinery Co.
#58 Ryuji Shiratani 4 Sumitomo Construction Machinery Co.
#59 Takahisa Oasa 4 Komatsu
#60 Takeshi Oi 4 Mitsubishi Electric
#61 Thomas Marshall Congdon 4 Caterpillar
#62 Yasuhiko Kanari 4 Hitachi Construction Machinery Co.
#63 Yoshiro Iwasaki 4 Komatsu
#64 Yusuke Suzuki 4 Toyota
#65 Brian Coulson 3 Ssab Technology Ab
#66 Brad Robert Van De Veer 3 Caterpillar
#67 Christian Heichel 3 Abi Anlagentechnik-Baumaschinen-Industriebedarf Maschinenfabrik Und Vertriebsgesellschaft Mbh
#68 Daiki Abe 3 Kubota
#69 David John Aughton 3 Rubicon Research Pty
#70 Daniel Bartminn 3 Innogy Se
#71 David L. Cox 3 Caterpillar
#72 Daniel Hofland 3 Vermeer Manufacturing
#73 Daichi Noborio 3 Yamaha Motor
#74 Daisuke NODA 3 Shin-Etsu Chemical Co.
#75 David A. Veasy 3 John Deere
#76 Ethan M. Tevis 3 Caterpillar
#77 Hiromasa Takahashi 3 Hitachi
#78 Ichiro Wada 3 Unicharm
#79 James G. Jamilosa 3 Caterpillar
#80 Joshua D. Zimmerman 3 Cnh Industrial America
#81 Junji Yamamoto 3 —
#82 Kazuhiko Mizoguchi 3 Hitachi Construction Machinery Co.
#83 Keiji Honda 3 Pfu Limited
#84 Kento KUMAGAI 3 Hitachi Construction Machinery Co.
#85 Kiwamu Takahashi 3 Hitachi Construction Machinery Tierra Co.
#86 Koji Hyodo 3 Hitachi Construction Machinery Co.
#87 Kohei Okazaki 3 Yanmar Holdings Co.
#88 Masaki Daimon 3 Komatsu
#89 Masamichi Ito 3 Sony
#90 Manoj Kumar Tyagi 3 Tensar International
#91 Mohamad Youssef Bilal 3 Hensley Industries
#92 Nathan J. Horstman 3 John Deere
#93 Robert Kotlaba 3 Aim Intelligent Machines
#94 Ryou Yagisawa 3 Hitachi Construction Machinery Co.
#95 Shawn Nainan Mathew 3 Caterpillar
#96 Shogo Miyazaki 3 Komatsu
#97 Shinji Nishikawa 3 Hitachi Construction Machinery Co.
#98 Shinjiro YAMAMOTO 3 Hitachi Construction Machinery Co.
#99 Steven Edward DeMay 3 —
#100 Takao Ishihara 3 Komatsu

Top Companies

Rank ↑ Company ↕ Patents ↕
1 Caterpillar 91
2 Komatsu 84
3 Hitachi Construction Machinery Co. 73
#4 John Deere 42
#5 Kobelco Construction Machinery Co. 31
#6 Kubota 31
#7 Sumitomo Construction Machinery Co. 20
#8 Sumitomo Heavy Industries 20
#9 Volvo Construction Equipment Ab 16
#10 Unknown 15
#11 Hd Hyundai Infracore Co. 10
#12 Yanmar Power Technology Co. 10
#13 Cnh Industrial America 9
#14 Built Robotics 7
#15 Joy Global Surface Mining 7
#16 Doosan Bobcat North America 6
#17 Esco Group 6
#18 Great Plains Manufacturing 6
#19 Kawasaki 6
#20 Hubbell Incorporated 5
#21 Vermeer Manufacturing 5
#22 Aim Intelligent Machines 4
#23 Hitachi Construction Machinery Tierra Co. 4
#24 Abi Anlagentechnik-Baumaschinen-Industriebedarf Maschinenfabrik Und Vertriebsgesellschaft Mbh 3
#25 Bauer Spezialtiefbau Gmbh 3
#26 Geopier Foundation Company 3
#27 Hensley Industries 3
#28 Hiroshima University 3
#29 Iqip Holding B.V. 3
#30 Jiangsu Xcmg Construction Machinery Research Institute 3
#31 Ålö Ab 3
#32 Liebherr-Hydraulikbagger Gmbh 3
#33 Nanjing Hydraulic Research Institute 3
#34 Nec 3
#35 Oilquick Deutschland Kg 3
#36 Rubicon Research Pty 3
#37 Ssab Technology Ab 3
#38 The Charles Machine Works 3
#39 Topcon Positioning Systems 3
#40 Beijing Urban Construction Design & Development Group Co., Limited 2
#41 Cccc First Harbor Engineering Co. 2
#42 Dalian University Of Technology 2
#43 Danfoss A/S 2
#44 Danfoss Power Solutions 2
#45 Elobau Gmbh & Co. Kg 2
#46 Equinor Energy As 2
#47 Institute Of Mountain Hazzards And Environment, Chinese Academy Of Sciences 2
#48 J. C. Bamford Excavators Limited 2
#49 Koninklijke Bam Groep N.V. 2
#50 Liebherr-Mining Equipment Colmar Sas 2
#51 Liebherr-Werk Nenzing Gmbh 2
#52 Northwest Institute Of Eco-Environment And Resources, Cas 2
#53 One Pass Innovators 2
#54 Rotech Group Limited 2
#55 Rwe Renewables Gmbh 2
#56 Saipem S.P.A. 2
#57 Shandong University 2
#58 Soil Machine Dynamics Limited 2
#59 Tensar International 2
#60 Terracon Consultants 2
#61 Wilkinson Ecological Design 2
#62 Yanmar Holdings Co. 2
#63 Zhejiang University 2
#64 Abi Attachments 1
#65 Aco Ahlmann Se & Co. Kg 1
#66 Advanced Building Products 1
#67 Altec Industries 1
#68 American Piledriving Equipment 1
#69 Aquadation 1
#70 Arizona Board Of Regents For And On Behalf Of Arizona State University 1
#71 Artemis Intelligent Power Limited 1
#72 Asahi Intecc Co. 1
#73 Austin Engineering Limited 1
#74 Autonomous Solutions 1
#75 Axenox, Llc. 1
#76 Beijing Baidu Netcom Science Technology Co. 1
#77 Bradken Resources Pty Limited 1
#78 Brokk Aktiebolag 1
#79 Case Western Reserve University 1
#80 Changjiang River Scientific Research Institute 1
#81 Changjiang River Scientific Research Institute Of Changjiang Water Resources Commission 1
#82 Changsha University Of Science And Technology 1
#83 Changzhou University 1
#84 Channell Commercial 1
#85 China Railway Tunnel Group Co. 1
#86 China Three Gorges 1
#87 China University Of Mining And Technology-Beijing 1
#88 Continental Automotive Gmbh 1
#89 Conwed Plastics Acquisition Company V 1
#90 Cqms Pty 1
#91 Crary Industries 1
#92 Cummins 1
#93 Deep Reach Technoloy 1
#94 Dong-A University Research Foundation For Industry-Academy Cooperation 1
#95 Ecole Polytechnique Federale De Lausanne (Epfl) 1
#96 Eddy Pump 1
#97 Elta Systems 1
#98 Equipment Corporation Of America 1
#99 Feng He Ying Zao Group Co. 1
#100 G2 Turftools 1