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Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025

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 422 patents in 2024.peak 4221996: 177 patents19961997: 154 patents1998: 176 patents1999: 145 patents19992000: 161 patents2001: 230 patents2002: 225 patents20022003: 193 patents2004: 156 patents2005: 161 patents20052006: 147 patents2007: 137 patents2008: 120 patents20082009: 147 patents2010: 209 patents2011: 179 patents20112012: 246 patents2013: 321 patents2014: 338 patents20142015: 329 patents2016: 327 patents2017: 365 patents20172018: 325 patents2019: 377 patents2020: 392 patents20202021: 383 patents2022: 363 patents2023: 349 patents20232024: 422 patents2025: 387 patents2025

Top Inventors

Rank Inventor Patents Primary Company
1 Jared Klineman Cooper 9 GE
2 Shunichi Nakao 8 Kawasaki
3 Takehiro Nishimura 8 Kawasaki
#4 Ajith Kuttannair Kumar 7 GE
#5 James W. Forbes 6 National Steel Car Limited
#6 Toshiyuki Hirashima 6 Kawasaki
#7 Takayuki Ogawa 5 Kyb
#8 Eric C. Wright 4
#9 Jeffrey Michael Fries 4 Alstom Transport Technologies
#10 Joseph Forrest Noffsinger 4 GE
#11 Yoshiyuki Shimokawa 4 Kabushiki Kaisha Toshiba
#12 Alon Green 3 Thales Canada
#13 Bradley J. Thomas 3 Gunderson
#14 David Michael Peltz 3 GE
#15 Firth Whitwam 3 Thales Canada
#16 F. Andrew Nibouar 3 Bedloe Industries
#17 Glenn Robert Shaffer 3 GE
#18 Hiroyuki Maeyama 3 Mitsubishi Electric
#19 Hitoshi Nagahara 3 Kawasaki
#20 Jeffrey D. Kernwein 3
#21 Kengo Oohashi 3 Nippon Sharyo
#22 Kousuke Katahira 3 Mitsubishi Electric
#23 Koji Nakao 3 Nippon Sharyo
#24 Mark Alan Fanara 3 Electro-Motive Diesel
#25 Masaaki Mizuno 3 Mitsubishi Chemical
#26 Manuel Tavares 3 Pennsy
#27 Mitsuhiro Matsumoto 3 Sharp Kabushiki Kaisha
#28 Seiichi Hayashi 3 Hitachi
#29 Shirou Honma 3 Kawasaki
#30 Takeyoshi Kusunoki 3 Kawasaki
#31 Wayne H. Murphy 3 Pennsy
#32 Wolfgang Daum 3 GE
#33 Zachary Ryan Brook 3 Pennsy
#34 Aaron Stern 2 Pennsy
#35 Abe Kanner 2 Thales Canada
#36 Adrian Biadatz 2 Siemens Aktiengesellschaft
#37 Alain Mollet 2 Pomagalski
#38 Alexander Shubs, Jr. 2 Electro-Motive Diesel
#39 Andreas Mair 2 Knorr-Bremse Ag
#40 Arnaud Turmeau 2 Skf Aerospace France S.A.S
#41 Aric Albert Weingartner 2 GE
#42 Brent Duffner 2 Voestalpine Nortrak
#43 Brian A. Senn 2 Powerbrace
#44 Carlos Sabino Paulino 2 GE
#45 Carl Schwellnus 2 Thales Canada
#46 Chihiro Okayama 2 Kawasaki
#47 Colin Bantin 2 Thales Canada
#48 Daniel A. Deninger 2 Smartdrive Systems
#49 David Dimmer 2 Thales Canada
#50 David J. Goding 2 Electro-Motive Diesel
#51 Dennis Melas 2 Electro-Motive Diesel
#52 Derek Kevin Woo 2 GE
#53 Dirk Rohwerder 2 Siemens Aktiengesellschaft
#54 Erich Leonard 2
#55 Federico Bavaresco 2 Dana Italia S.R.L.
#56 Gary Click 2 Vae Nortrak North America
#57 Gary C. Walter 2 Union Tank Car
#58 Giuseppe Conte 2 General Motors
#59 Gregory Raymond Kupiec 2 Electro-Motive Diesel
#60 Henry Lehmann 2 Knorr-Bremse Systeme Für Schienenfahrzeuge Gmbh
#61 Howard E. Huber, Jr. 2
#62 Jamal Hematian 2 National Steel Car Limited
#63 James S. Kennedy 2 A. Stucki
#64 Jason Palmer 2 Smartdrive Systems
#65 James David Seaton 2 Electro-Motive Diesel
#66 Jeffrey Orion Pritchard 2 Intel
#67 Jerry R. Smerecky 2 Bedloe Industries
#68 Jeffrey Scott Tippey 2
#69 Joseph Donnan 2
#70 John W. McElroy 2 GE
#71 Jun Aoki 2 Olympus
#72 Karl Ginter 2 Intertrust Technologies
#73 Kentaro Hayashi 2 Semiconductor Energy Laboratory
#74 Kevin Pykkonen 2 Bright Energy Storage Technologies, Llp
#75 Marshall G. Beck 2
#76 Masahito Chihira 2 Mitsubishi Electric
#77 Marc-Gregory Elstorpff 2 Knorr-Bremse Systeme Für Schienenfahrzeuge Gmbh
#78 Mark Freitas 2 Smartdrive Systems
#79 Masao Oki 2 Mitsubishi Electric
#80 Martin Teichmann 2 Siemens Ag Österreich
#81 Masaru Uchida 2 Fujitsu Limited
#82 Mark Adrianus Johannes van der Mee 2 Sabic Global Technologies B.V.
#83 Michael K. Burke 2 Zeftek
#84 Michael Wusching 2 Bombardier Transportation Gmbh
#85 Nicholas B. Earnest 2 Miner Enterprises
#86 Nicholas David Nagrodsky 2 Alstom Transport Technologies
#87 Osamu Muragishi 2 Kawasaki
#88 Patricia Sue Lacy 2 GE
#89 Paul Dean Sybert 2 Sabic Global Technologies B.V.
#90 Peter J. Douglas 2 Union Tank Car
#91 Perry Levitt 2 Pennsy
#92 Ralph C. Haddock, III 2 GE
#93 Richard M. Charney 2 Miner Enterprises
#94 Richard Lee Lawson 2 GE
#95 Richard Rathammer 2 Knorr-Bremse Systeme Für Schienenfahrzeuge Gmbh
#96 Roland Sebastian Assink 2 Sabic Global Technologies B.V.
#97 Rodney Ignatius 2 Thales Canada
#98 Robert Palanti 2 GE
#99 Ross Pirtle 2
#100 Roland Porsch 2 Siemens Aktiengesellschaft

Top Companies

Rank Company Patents
1 Kawasaki 23
2 GE 23
3 Westinghouse Air Brake 19
#4 Siemens Aktiengesellschaft 17
#5 Mitsubishi Electric 13
#6 Electro-Motive Diesel 10
#7 Nippon Steel & Sumitomo Metal 9
#8 Bombardier Transportation Gmbh 7
#9 Siemens Industry 7
#10 Thales Canada 7
#11 National Steel Car Limited 6
#12 Nippon Sharyo 6
#13 Knorr-Bremse Systeme Für Schienenfahrzeuge Gmbh 5
#14 Kyb 4
#15 Pennsy 4
#16 Aktiebolaget Skf 3
#17 Alstom Transport Technologies 3
#18 Gunderson 3
#19 Miner Enterprises 3
#20 Progress Rail Services 3
#21 Siemens Ag Österreich 3
#22 Union Tank Car 3
#23 Unknown 3
#24 Amsted Rail Company 2
#25 Amsted Rail-Faiveley 2
#26 A. Stucki 2
#27 Bedloe Industries 2
#28 Bright Energy Storage Technologies, Llp 2
#29 Firestone Industrial Products Company 2
#30 Innova Patent Gmbh 2
#31 International Electronic Machines 2
#32 J.W. Speaker 2
#33 Kayaba Industry Co. 2
#34 Mitsubishi Electric 2
#35 Nabtesco 2
#36 Nippon Signal Co. 2
#37 Norfolk Southern 2
#38 Ropfin B.V. 2
#39 Sabic Global Technologies B.V. 2
#40 Smartdrive Systems 2
#41 Voestalpine Nortrak 2
#42 Comcast 2
#43 IBM 2
#44 Aero Transportation Products 1
#45 Axtone Spolka Akcyjna 1
#46 Calbrandt 1
#47 Cambridge Enterprise Limited 1
#48 Central Japan Railway Comany 1
#49 Changchun Railway Vehicles Co. 1
#50 Columbus Steel Castings 1
#51 Dellner Couplers Ab 1
#52 Eurotech S.P.A. 1
#53 Gaseous Fuel Systems 1
#54 Hübner Gmbh & 1
#55 Hitachi 1
#56 Jac Operations 1
#57 Kabushiki Kaisha Toshiba 1
#58 KFUPM 1
#59 Knorr-Bremse Ag 1
#60 Knorr-Bremse Rail Systems (Uk) Limited 1
#61 KAIST 1
#62 Korea Railroad Research Institute 1
#63 L.B. Foster Rail Technologies 1
#64 Lsis Co. 1
#65 Mammoet Usa South 1
#66 MIT 1
#67 Mcalister Technologies 1
#68 Nevis Industries 1
#69 Nissan Motor Co. 1
#70 Ntn 1
#71 Ntt Docomo 1
#72 Overhead Door 1
#73 Panasec 1
#74 Pomagalski 1
#75 Powerbrace 1
#76 Precision Rail And Mfg. 1
#77 Ride 1
#78 Rockwell Collins 1
#79 Salco Products 1
#80 Schaefer Equipment 1
#81 Siemens Healthcare Diagnostics 1
#82 Siemens Schweiz Ag 1
#83 Sommital 1
#84 Standard Car Truck 1
#85 Stc 1
#86 Sumitomo Electric Industries 1
#87 Takraf Gmbh 1
#88 Tata Consultancy Services Limited 1
#89 Terex Mhps Gmbh 1
#90 The Island Radar 1
#91 The University Of Tokyo 1
#92 Toyo Tire & Rubber Co. 1
#93 Transportation Technology Services 1
#94 Trinity Industrial 1
#95 Ttx 1
#96 Union Pacific Railroad 1
#97 Voith Patent Gmbh 1
#98 Wfk & Associates 1
#99 Tesla 1