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

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 Akihiro Narazaki 12 Hitachi Construction Machinery Co.
2 Shinya Imura 11 Hitachi Construction Machinery Co.
3 Yoichiro Yamazaki 11 Kobelco Construction Machinery Co.
#4 Ryota HAMAMOTO 10 Kubota
#5 Yuji Fukuda 9 Kubota
#6 Takaaki CHIBA 8 Hitachi Construction Machinery Co.
#7 Douglas C. Serrurier 7 Caterpillar
#8 Eric T. Sinn 7 Caterpillar
#9 Etsuro KOMORI 7 Nabtesco
#10 Ethan M. Tevis 7 Caterpillar
#11 Hiroshi Horii 7 IBM
#12 Hiroaki Tanaka 7 Denso
#13 Kevin Kaufman 7 Pier Tech Systems
#14 Kento KUMAGAI 7 Hitachi Construction Machinery Co.
#15 Michael C. Gentle 7 Caterpillar
#16 Shinji Nishikawa 7 Hitachi Construction Machinery Co.
#17 Hidekazu Moriki 6 Hitachi Construction Machinery Co.
#18 Michael G. Kean 6 John Deere
#19 Michael D. Wilkis 6 Pier Tech Systems
#20 Noah Austen Ready-Campbell 6 Built Robotics
#21 Shiho Izumi 6 Hitachi Construction Machinery Co.
#22 Teruki IGARASHI 6 Hitachi Construction Machinery Co.
#23 Yasutaka Tsuruga 6 Hitachi Construction Machinery Co.
#24 Andrew Xiao Liang 5 Built Robotics
#25 Corey Michael Wells 5 Caterpillar
#26 Daiki Abe 5 Kubota
#27 Daisuke Kawaguchi 5 Canon
#28 David Bruno Parzynski, Jr. 5 Caterpillar
#29 Hiroaki AMANO 5 Hitachi Construction Machinery Co.
#30 Hideki Nakajima 5 Caterpillar
#31 Hitoshi Sasaki 5 Kobelco Construction Machinery Co.
#32 Justin L. Steinlage 5 Caterpillar
#33 Koichi KIYASU 5 Caterpillar
#34 Thomas Marshall Congdon 5 Caterpillar
#35 Yusuke Sano 5 Sumitomo Heavy Industries
#36 Yusuke Suzuki 5 Toyota
#37 Charles Almy 4 Ojjo
#38 Daisuke NODA 4 Shin-Etsu Chemical Co.
#39 Dennis Agnew 4 Doosan Bobcat North America
#40 Eiji Ishibashi 4 Komatsu
#41 Giovanni A. Wuisan 4 John Deere
#42 Hideaki Horii 4 Nec Electronics
#43 Ian Taylor 4 Sonny'S Hfi Holdings
#44 James G. Jamilosa 4 Caterpillar
#45 Jason Jura 4 Caterpillar
#46 Jacob C. Maley 4 Caterpillar
#47 Johannes HALDER 4 Liebherr-Components Biberach Gmbh
#48 Justin Odegaard 4 Doosan Bobcat North America
#49 Kohei NAGAO 4 Kubota
#50 Mark W. Thompson 4 Caterpillar
#51 Nathan L. Schlueter 4 Core Distribution
#52 Roland Widmann 4 Liebherr-Components Biberach Gmbh
#53 Ryu NARIKAWA 4 Hitachi Construction Machinery Co.
#54 Satoshi Takaki 4 Canon
#55 Seiji Saiki 4 Kobelco Construction Machinery Co.
#56 Shinji Ishihara 4 Hitachi Construction Machinery Co.
#57 Shinjirou Yamamoto 4 Hitachi Construction Machinery Co.
#58 Shinjiro YAMAMOTO 4 Hitachi Construction Machinery Co.
#59 Takeya IZUMIKAWA 4 Sumitomo Construction Machinery Co.
#60 Takashi Nishi 4 Sumitomo Construction Machinery Co.
#61 Timothy Meschke 4 Sonny'S Hfi Holdings
#62 Yasuhiko Kanari 4 Hitachi Construction Machinery Co.
#63 Yutaka Fukuda 4 Denso
#64 Adam Nackers 3 Caterpillar
#65 Akira Kanazawa 3 Hitachi Construction Machinery Co.
#66 Benjamin J. Hodel 3 Caterpillar
#67 Brent Durkin 3 Clark Equipment
#68 Bradley P. Krone 3 Caterpillar
#69 Brandon Hammig McCaffrey 3 Caterpillar
#70 Chunnan Wu 3 Sumitomo Heavy Industries
#71 Daniel Bartminn 3 Innogy Se
#72 Dana Nelson 3 Doosan Bobcat North America
#73 David Alan Putnam 3 —
#74 Ezhil Valavan Karunakaran 3 Caterpillar
#75 Gaurav Jitendra Kikani 3 Built Robotics
#76 Gregory Allen DeWind 3 One Pass Innovators
#77 Hiroya MORI 3 Kubota
#78 Hideyasu Muraoka 3 Kawasaki
#79 Hiroaki Nakagawa 3 Kubota
#80 Hiroshi Sakamoto 3 Hitachi
#81 Hiroshi Yoshida 3 Kabushiki Kaisha Toshiba
#82 Huichao DAI 3 China Three Gorges
#83 Jack West 3 Tesla
#84 Joel Honeyman 3 Clark Equipment
#85 Junki ITO 3 Kubota
#86 Jun Wang 3 Wenhou University
#87 Kazuyoshi OKABE 3 Komatsu
#88 Kazuki Tamura 3 Toyota
#89 Kazuki Ueda 3 Kubota
#90 Ken Nishihara 3 Komatsu
#91 Kiwamu Takahashi 3 Hitachi Construction Machinery Tierra Co.
#92 Masaki Akiyama 3 Canon
#93 Masashi Danguchi 3 Yanmar Holdings Co.
#94 Matt Sagaser 3 Doosan Bobcat North America
#95 Miok Kim 3 LG
#96 Mo Wei 3 Caterpillar
#97 Nathan J. Horstman 3 John Deere
#98 Ryan DeWind 3 One Pass Innovators
#99 Ryohei FUKUCHI 3 Hitachi Construction Machinery Co.
#100 Ryuta OKUWAKI 3 Komatsu

Top Companies

Rank ↑ Company ↕ Patents ↕
1 Caterpillar 101
2 Hitachi Construction Machinery Co. 50
3 Komatsu 43
#4 Kubota 38
#5 John Deere 31
#6 Kobelco Construction Machinery Co. 20
#7 Sumitomo Construction Machinery Co. 18
#8 Sumitomo Heavy Industries 14
#9 Doosan Bobcat North America 13
#10 Yanmar Holdings Co. 11
#11 Volvo Construction Equipment Ab 10
#12 Pier Tech Systems 7
#13 Built Robotics 6
#14 Nabtesco 6
#15 Hd Hyundai Infracore Co. 5
#16 J. C. Bamford Excavators Limited 5
#17 Ojjo 5
#18 Joy Global Surface Mining 4
#19 Kawasaki 4
#20 Shandong University 4
#21 Sonny'S Hfi Holdings 4
#22 Unknown 4
#23 Yanmar Power Technology Co. 4
#24 Danaher 4
#25 China Three Gorges 3
#26 Cnh Industrial America 3
#27 Jiangsu Xcmg Construction Machinery Research Institute 3
#28 Liebherr-Components Biberach Gmbh 3
#29 Metalogenia Research & Technologies, S.L. 3
#30 Nec 3
#31 Sandvik Mining And Construction Oy 3
#32 Takeuchi Mfg., Co. 3
#33 Zhejiang University 3
#34 Bauer Maschinen Gmbh 2
#35 Bauer Spezialtiefbau Gmbh 2
#36 China Three Gorges University 2
#37 Earth Wall Products 2
#38 Equinor Energy As 2
#39 Great Plains Manufacturing 2
#40 Halliburton Energy Services 2
#41 Hensley Industries 2
#42 Hiroshima University 2
#43 Hitachi Construction Machinery Tierra Co. 2
#44 Junttan Oy 2
#45 Manitou Bf 2
#46 Manitou Equipment America 2
#47 Minesense Technologies 2
#48 Ørsted Wind Power A/S 2
#49 Shanghai Sany Heavy Machinery Co. 2
#50 Siemens Gamesa Renewable Energy 2
#51 Tensar International 2
#52 The Toro 2
#53 Vermeer Manufacturing 2
#54 Volvo Autonomous Solutions Ab 2
#55 Zf Friedrichshafen Ag 2
#56 AT&T 1
#57 Aim Intelligent Machines 1
#58 American Piledriving Equipment 1
#59 Anchor Wall Systems 1
#60 Baidu Usa 1
#61 Brandt Industries Canada 1
#62 Cccc First Harbor Engineering Co. 1
#63 Cciip 1
#64 Changjiang River Scientific Research Institute 1
#65 China Tiesiju Civil Engineering Group Co. 1
#66 Climate 1
#67 Cnh Industrial Canada 1
#68 Contech Engineered Solutions 1
#69 Cummins 1
#70 Curtis Industries 1
#71 Dana Italia S.R.L. 1
#72 Danfoss A/S 1
#73 Delta Subsea 1
#74 Eagle Industry Co. 1
#75 Eddy Pump 1
#76 Electronic Power Design 1
#77 Esco Group 1
#78 Federal Signal 1
#79 Geobrugg Ag 1
#80 Geopier Foundation Company 1
#81 George Mason University 1
#82 Georgia Tech Research 1
#83 Giken 1
#84 Group14 Technologies 1
#85 Hadronex 1
#86 Harbo Technologies 1
#87 Heerema Marine Contractors Nederland Se 1
#88 Hohai University 1
#89 Illinois Tool Works 1
#90 Independence Materials Group 1
#91 Infracom 1
#92 Iqip Holding B.V. 1
#93 Japan Aviation Electronics Industry, Limited 1
#94 Jdc 1
#95 Keller Holding Gmbh 1
#96 Keystone Retaining Wall Systems 1
#97 Kundel Industries 1
#98 Liebherr-France Sas 1
#99 Liebherr-Werk Bischofshofen Gmbh 1
#100 Lincoln Global 1