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Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Technologies › Hydraulic and foundation engineering

Hydraulic and foundation engineering Patent Leaders All Time

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 78 Hitachi Construction Machinery Co.
2 Yuji Fukuda 78 Kubota
3 Kouji Ishikawa 70 Hitachi Construction Machinery Co.
#4 Thomas Marshall Congdon 61 Caterpillar
#5 Genroku Sugiyama 53 Hitachi Construction Machinery Co.
#6 Douglas C. Serrurier 52 Caterpillar
#7 Toichi Hirata 50 Hitachi Construction Machinery Co.
#8 Yasutaka Tsuruga 48 Hitachi Construction Machinery Co.
#9 Hidekazu Moriki 47 Hitachi Construction Machinery Co.
#10 Shiho Izumi 46 Hitachi Construction Machinery Co.
#11 Joseph J. Colwell 41 —
#12 Eric T. Sinn 40 Caterpillar
#13 Hiroshi Sakamoto 40 Hitachi
#14 Noah Austen Ready-Campbell 39 Built Robotics
#15 Yoichiro Yamazaki 39 Kobelco Construction Machinery Co.
#16 Andrew Xiao Liang 37 Built Robotics
#17 Kiwamu Takahashi 36 Hitachi Construction Machinery Tierra Co.
#18 Michael G. Kean 36 John Deere
#19 Shinji Nishikawa 36 Hitachi Construction Machinery Co.
#20 Hidetoshi Satake 35 Hitachi Construction Machinery Co.
#21 Shigeru Yamamoto 35 Komatsu
#22 Christopher M. Carpenter 34 Esco Group
#23 Kord J. Wissmann 34 Geopier Foundation Company
#24 Akihiro Kondo 32 Kawasaki
#25 William K. Hilfiker 32 Hilfiker Pipe Co.
#26 Hiroshi Watanabe 31 Kabushiki Kaisha Toshiba
#27 John L. White 31 American Piledriving Equipment
#28 Masatoshi Hoshino 31 Hitachi Construction Machinery Co.
#29 Mo Wei 31 Caterpillar
#30 Neal W. Westendorf 31 Westendorf Manufacturing Co.
#31 Seiji Hijikata 31 Hitachi Construction Machinery Co.
#32 Hiroaki Tanaka 30 Denso
#33 Kenjiro Shimada 30 Komatsu
#34 Michael Linstroth 30 —
#35 Nathan Bjerke 30 Caterpillar
#36 Terry L. Briscoe 30 Esco Group
#37 Phillip J. Kunz 29 Caterpillar
#38 Ryota HAMAMOTO 29 Kubota
#39 Tsuyoshi Nakamura 29 Tokyo Ohka Kogyo Co.
#40 Akihiro Narazaki 28 Hitachi Construction Machinery Co.
#41 Jason Jura 28 Caterpillar
#42 John A. Ruvang 28 G. H. Hensley Industries, Incorporated
#43 Seiji Saiki 28 Kobelco Construction Machinery Co.
#44 Takeya IZUMIKAWA 28 Sumitomo Construction Machinery Co.
#45 Thomas P. Taylor 28 T&B Structural Systems
#46 David Bruno Parzynski, Jr. 27 Caterpillar
#47 Eiji Ishibashi 27 Komatsu
#48 Joseph W. Langenfeld 27 Westendorf Manufacturing Co.
#49 Kazuo Fujishima 27 Hitachi Construction Machinery Co.
#50 Hiroshi Horii 26 IBM
#51 Masashi Ichihara 26 Komatsu
#52 Robert S. Bierwith 26 Suncor
#53 Toshihiko Takemura 26 Kubota
#54 John R. Ramun 25 Allied Gator
#55 Kenji Hiraku 25 Hitachi Construction Machinery Co.
#56 Koji Hyodo 25 Hitachi Construction Machinery Co.
#57 Nathan J. Horstman 25 John Deere
#58 Shinji Ishihara 25 Hitachi Construction Machinery Co.
#59 Yoshiki Kami 25 Komatsu
#60 Bo Vigholm 24 Volvo Construction Equipment Ab
#61 Chunnan Wu 24 Sumitomo Heavy Industries
#62 Hiroyuki Tsukamoto 24 Sumitomo Construction Machinery Co.
#63 Manabu Edamura 24 Hitachi Construction Machinery Co.
#64 Michael Taylor 24 Caterpillar
#65 Robert A. MacDonald 24 Keystone Retaining Wall Systems
#66 Harold M. Bowman 23 Unknown
#67 Kenneth L. Stratton 23 Caterpillar
#68 Takaaki CHIBA 23 Hitachi Construction Machinery Co.
#69 William J. Hren 23 —
#70 Hiroaki AMANO 22 Hitachi Construction Machinery Co.
#71 Masanori Ikari 22 Komatsu
#72 Patrick Simon Campomanes 22 Caterpillar
#73 Tetsuji Tanaka 22 Sumitomo Wiring Systems
#74 Tomohiro Nakagawa 22 Komatsu
#75 Wesley P. Taylor 22 —
#76 Gaurav Jitendra Kikani 21 Built Robotics
#77 Hideyasu Muraoka 21 Kawasaki
#78 James Heselden 21 Hesco Bastion Limited
#79 Jorge Triginer Boixeda 21 Metalogenia Research & Technologies, S.L.
#80 Junya Kawamoto 21 Hitachi Construction Machinery Co.
#81 Koji Yamashita 21 Mitsubishi Electric
#82 Lance R. Sherlock 21 John Deere
#83 Michael C. Gentle 21 Caterpillar
#84 Robert J. Price 21 Caterpillar
#85 Ryuji Shiratani 21 Sumitomo Construction Machinery Co.
#86 Toru Matsuyama 21 Seiko Epson
#87 Wally L. Kaczmarski 21 Clark Equipment
#88 William J. Renski 21 Caterpillar
#89 Yuki Shimano 21 Komatsu
#90 David J. White 20 Geopier Foundation Company
#91 Giovanni A. Wuisan 20 John Deere
#92 Richard Nicoson 20 Joy Global Surface Mining
#93 Steven C. Budde 20 Caterpillar
#94 Takatoshi Ooki 20 Hitachi Construction Machinery Co.
#95 Aaron R. Kenkel 19 John Deere
#96 Allan P. Henderson 19 Terracon Consultants
#97 Claude M. Frisbee 19 J. I. Case
#98 David J. Myers 19 W.L. Gore & Associates Gmbh
#99 Haruhiko Kawasaki 19 Kayaba Industry Co.
#100 Hiroaki Nakagawa 19 Kubota

Top Companies

Rank ↑ Company ↕ Patents ↕
1 Caterpillar 1,611
2 Komatsu 924
3 Hitachi Construction Machinery Co. 685
#4 John Deere 519
#5 Unknown 343
#6 Kubota 313
#7 Kobelco Construction Machinery Co. 282
#8 Esco Group 150
#9 Clark Equipment 148
#10 Sumitomo Construction Machinery Co. 146
#11 Volvo Construction Equipment Ab 144
#12 J. I. Case 124
#13 Harnischfeger 119
#14 Cnh Industrial America 106
#15 Komatsu Shisakusho 104
#16 Sumitomo Heavy Industries 100
#17 Doosan Infracore Co. 80
#18 ExxonMobil 62
#19 Shin Caterpillar Mitsubishi 59
#20 Vermeer Manufacturing 59
#21 Case Gmbh 56
#22 Yanmar Holdings Co. 55
#23 Bauer Maschinen Gmbh 53
#24 J. C. Bamford Excavators Limited 53
#25 Joy Global Surface Mining 52
#26 Volvo Construction Equipment Holding Sweden Ab 51
#27 American Piledriving Equipment 50
#28 Kawasaki 47
#29 The Charles Machine Works 44
#30 Ihc Holland Ie B.V. 43
#31 Geopier Foundation Company 41
#32 Hitachi Construction Machinery Tierra Co. 41
#33 Kobe Steel 40
#34 Built Robotics 39
#35 Halliburton Energy Services 39
#36 Keystone Retaining Wall Systems 39
#37 Shell Oil Compny 39
#38 Chevron 39
#39 Cnh America 37
#40 Hubbell Incorporated 37
#41 Hensley Industries 36
#42 US Air Force 35
#43 Dresser Industries 34
#44 Samsung 34
#45 Liebherr-Hydraulikbagger Gmbh 31
#46 Bauer Spezialtiefbau Gmbh 30
#47 Rockland 30
#48 Westendorf Manufacturing Co. 30
#49 Soletanche Freyssinet 29
#50 US Army 29
#51 Bridgestone 28
#52 Trimble Navigation Limited 27
#53 G. H. Hensley Industries, Incorporated 25
#54 Hesco Bastion Limited 25
#55 Soilmec S.P.A. 25
#56 Ihc Holland N.V. 24
#57 Kayaba Industry Co. 23
#58 Tensar Corporation 23
#59 The Toro 23
#60 Anchor Wall Systems 22
#61 Kobe Steel 22
#62 Topcon Positioning Systems 22
#63 Doosan Bobcat North America 21
#64 Technip France 21
#65 Yanmar Power Technology Co. 21
#66 Saudi Arabian Oil 20
#67 Cqms Pty 19
#68 Ojjo 19
#69 O & K Orenstein And Koppel Ag 19
#70 Societe Civile Des Brevets Henri C. Vidal 19
#71 Pilepro Gmbh 18
#72 Saipem S.P.A. 18
#73 A. B. Chance 17
#74 Atlantic Richfield 17
#75 Dusol Limited Liability 17
#76 Husqvarna Ab 17
#77 Mclaughlin Group 17
#78 Nabtesco 17
#79 New Holland North America 17
#80 Shell Offshore 17
#81 Terre Armee Internationale 17
#82 Cummins 16
#83 H&L Tooth 16
#84 M-B-W 16
#85 Mcdermott Technology 16
#86 Metalogenia Research & Technologies, S.L. 16
#87 Schnabel Foundation 16
#88 Zhejiang University 16
#89 Black & Decker 15
#90 Hd Hyundai Infracore Co. 15
#91 Phillips Petroleum 15
#92 Takeuchi Mfg., Co. 15
#93 Ford 15
#94 AT&T 14
#95 Conoco 14
#96 Deepsea Ventures 14
#97 Great Plains Manufacturing 14
#98 Kajima 14
#99 Linde Gmbh 14
#100 Lmk Technologies 14