Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Hydraulic and foundation engineering Patent Leaders in 2019 2019

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 Shinya Imura 15 Hitachi Construction Machinery Co.
2 Kouji Ishikawa 11 Hitachi Construction Machinery Co.
3 Hidekazu Moriki 10 Hitachi Construction Machinery Co.
#4 Yuji Fukuda 8 Kubota
#5 Seiji Hijikata 7 Hitachi Construction Machinery Co.
#6 Douglas C. Serrurier 6 Caterpillar
#7 Mihai Mircea Balan 6 Caterpillar
#8 Mo Wei 6 Caterpillar
#9 Yasutaka Tsuruga 6 Hitachi Construction Machinery Co.
#10 Akihiro Kondo 5 Kawasaki
#11 Hiroaki AMANO 5 Hitachi Construction Machinery Co.
#12 Kevin V. Keigley 5 Abi Attachments
#13 Kiwamu Takahashi 5 Hitachi Construction Machinery Tierra Co.
#14 Masafumi HITA 5 Hitachi Construction Machinery Co.
#15 Masahiro Kuroda 5 Kubota
#16 Shiho Izumi 5 Hitachi Construction Machinery Co.
#17 Toshihiko Takemura 5 Kubota
#18 David J. White 4 Geopier Foundation Company
#19 David Worth 4 Caterpillar
#20 Etsuo Fujita 4 Komatsu
#21 Gary Leonard Seider 4 Hubbell Incorporated
#22 Hiroaki Nakagawa 4 Kubota
#23 Hiroshi Sakamoto 4 Hitachi
#24 Hiroyoshi Yamaguchi 4 Nhk Spring Co.
#25 Jin Kitajima 4 Komatsu
#26 Jorge Triginer Boixeda 4 Metalogenia Research & Technologies, S.L.
#27 Kazuyoshi Arii 4 Kubota
#28 Kenji Hiraku 4 Hitachi Construction Machinery Co.
#29 Ki-Yong Kim 4 Samsung
#30 Masatoshi Hoshino 4 Hitachi Construction Machinery Co.
#31 Mark N. Howell 4 General Motors
#32 Nathan Bjerke 4 Caterpillar
#33 Patrick Simon Campomanes 4 Caterpillar
#34 Paul Russell Friend 4 Caterpillar
#35 Ryosuke Kinugawa 4 Kubota
#36 Ryohei Sumiyoshi 4 Kubota
#37 Ryohei Yamashita 4 Nichia
#38 Samuel Joseph Frei 4 Caterpillar
#39 Shunichiro Mori 4 Kubota
#40 Taiki Sugawara 4 Komatsu
#41 Takashi Tsukamoto 4 Komatsu
#42 Woo Yong Jung 4 Doosan Infracore Co.
#43 Yasunari Kato 4 Komatsu
#44 Amit Panjabrao Wankhade 3 Caterpillar
#45 Anab Akanda 3 Joy Global Surface Mining
#46 Bruce Alexander Leslie 3 Cqms Pty
#47 Corey Lee Gorman 3 Caterpillar
#48 Cody L. Sewell 3 The Charles Machine Works
#49 David Andrews 3 Cqms Pty
#50 Edward Wagner 3 Guangxi Liugong Machinery Co.
#51 Eric T. Sinn 3 Caterpillar
#52 Francisco Perez Soria 3 Metalogenia Research & Technologies, S.L.
#53 Hiroyuki Anami 3 Kubota
#54 Hiromasa Takahashi 3 Hitachi
#55 James R. Fontaine 3 Chapin Manufacturing
#56 Jason Jura 3 Caterpillar
#57 Javier Rol Corredor 3 Metalogenia, S.A.
#58 Jacob Carl Wyss 3 Caterpillar
#59 John W. Babcock 3 Inside Bet
#60 Kazuhiko Mizoguchi 3 Hitachi Construction Machinery Co.
#61 Masashi Ichihara 3 Komatsu
#62 Masahiro Ikeda 3 Komatsu
#63 Michael Taylor 3 Caterpillar
#64 Michael W. N. Wilson 3 Ail International
#65 Phillip J. Kunz 3 Caterpillar
#66 Satoshi Tajima 3 Kubota
#67 Shinji Ishihara 3 Hitachi Construction Machinery Co.
#68 Shunsuke Miyamoto 3 Komatsu
#69 Shinji Nishikawa 3 Hitachi Construction Machinery Co.
#70 Stephen P. Rutherford 3 Caterpillar
#71 Sueyoshi Nishimine 3 Komatsu
#72 Tadashi Kawaguchi 3 Komatsu
#73 Takeshi Kurihara 3 Komatsu
#74 Takatoshi Ooki 3 Hitachi Construction Machinery Co.
#75 Takashi Yokoo 3 Komatsu
#76 Thomas Marshall Congdon 3 Caterpillar
#77 Timothy Michael Kemp 3 Hubbell Incorporated
#78 Tony Childress 3 —
#79 Yoji Yudate 3 Kawasaki
#80 Yuto Fujii 3 Komatsu
#81 Yuta Kamoshita 3 Komatsu
#82 Yuji Yamashita 3 Kubota
#83 Aaron David Greer 2 Wacker Nueson Production Americas
#84 Aaron R. Kenkel 2 John Deere
#85 Adriano Garramone 2 Cnh Industrial America
#86 Aditya Singh 2 Cnh Industrial America
#87 Akihiko Mori 2 Mitsubishi Electric
#88 Akinori Onodera 2 Komatsu
#89 Andres Gonzalez 2 Adobe
#90 Andrea Gravili 2 Cnh Industrial America
#91 Anthony Dean McNealy 2 Caterpillar
#92 Andrew A. Schuermann 2 The Charles Machine Works
#93 August N Johnson 2 US Army
#94 Axel Römer 2 Hamm Ag
#95 Bahman Niroumand 2 —
#96 Bevan Hall 2 Cqms Pty
#97 Bobby G. Head 2 —
#98 Bon-Seuk Ku 2 Volvo Construction Equipment Ab
#99 Christopher Ryan Beasley 2 Caterpillar
#100 Christopher Benson 2 Rolls-Royce Plc

Top Companies

Rank ↑ Company ↕ Patents ↕
1 Caterpillar 85
2 Komatsu 44
3 Hitachi Construction Machinery Co. 40
#4 Kubota 25
#5 John Deere 22
#6 Cnh Industrial America 15
#7 Volvo Construction Equipment Ab 15
#8 Unknown 12
#9 Doosan Infracore Co. 11
#10 Joy Global Surface Mining 11
#11 Kawasaki 7
#12 Kobelco Construction Machinery Co. 7
#13 Sumitomo Construction Machinery Co. 7
#14 Hitachi Construction Machinery Tierra Co. 6
#15 Clark Equipment 5
#16 Ihc Holland Ie B.V. 5
#17 The Charles Machine Works 5
#18 Abi Attachments 4
#19 Cqms Pty 4
#20 Hubbell Incorporated 4
#21 Oceaneering International 4
#22 Power China Huadong Engineering Corporation Limited 4
#23 Soletanche Freyssinet 4
#24 Sumitomo Heavy Industries 4
#25 Vermeer Manufacturing 4
#26 Esco Group 3
#27 Guangxi Liugong Machinery Co. 3
#28 Hamm Ag 3
#29 Inside Bet 3
#30 Kyb 3
#31 Metalogenia Research & Technologies, S.L. 3
#32 Saipem S.P.A. 3
#33 Saudi Arabian Oil 3
#34 US Army 3
#35 American Piledriving Equipment 2
#36 Cashman Dredging And Marine Contracting, Co. 2
#37 Cummins 2
#38 Dewind One-Pass Trenching 2
#39 Geopier Foundation Company 2
#40 Goliathtech 2
#41 Hensley Industries 2
#42 Hitachi 2
#43 Husqvarna Ab 2
#44 Institute Of Mountain Hazzards And Environment, Chinese Academy Of Sciences 2
#45 Kcm 2
#46 Keller Holding Gmbh 2
#47 Keystone Retaining Wall Systems 2
#48 KFUPM 2
#49 Kinshofer Gmbh 2
#50 Loadtest 2
#51 Mclaughlin Group 2
#52 Neodrill As 2
#53 Osmose Utilities Services 2
#54 P.V. Flood Control 2
#55 Ship And Ocean Industries R&Dcenter 2
#56 Siemens Industry 2
#57 Simex Engineering S.R.L. 2
#58 Versabar 2
#59 Wacker Nueson Production Americas 2
#60 Wahoo Docks 2
#61 Wenzhou University 2
#62 Willacoochee Industrial Fabrics 2
#63 Yanmar Holdings Co. 2
#64 Abb Research 1
#65 Absolute Innovations 1
#66 Aco Sevrin Ahlmann Gmbh & Co Kg 1
#67 Agco 1
#68 American Muscle Docks & Fabrication 1
#69 Ammann Schweiz Ag 1
#70 Aqseptence Group 1
#71 Arizona Board Of Regents For And On Behalf Of Arizona State University 1
#72 Autonomous Solutions 1
#73 Awt Ip 1
#74 Basf Se 1
#75 Bauer Maschinen Gmbh 1
#76 Bauer Spezialtiefbau Gmbh 1
#77 Beijing University Of Technology 1
#78 Nevada System Of Higher Education On Behalf Of The Of The University Of Nevada, Reno 1
#79 Bradken Resources Pty Limited 1
#80 Brokk Aktiebolag 1
#81 Cambridge Enterprise Limited 1
#82 Cascade 1
#83 Cementation Skanska Limited 1
#84 Chemical Grouting Co. 1
#85 Climate 1
#86 Consolidated Edison Company Of New York 1
#87 Conwed Plastics Acquisition Company V 1
#88 Cortex Composites 1
#89 Cpac Systems Ab 1
#90 Csi Technologies 1
#91 Curtis Industries 1
#92 Daedong Industrial Co. 1
#93 Daemo Engineering Co. 1
#94 Donaldson Company 1
#95 Dynamic Shelters 1
#96 Earth 1
#97 Electronic Power Design 1
#98 Intellectual Ventures 1
#99 Emco Wheaton Retail 1
#100 Fiberweb 1