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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 635 patents in 2019.peak 6351996: 391 patents19961997: 366 patents1998: 463 patents1999: 476 patents19992000: 517 patents2001: 482 patents2002: 436 patents20022003: 419 patents2004: 421 patents2005: 414 patents20052006: 354 patents2007: 239 patents2008: 227 patents20082009: 289 patents2010: 374 patents2011: 334 patents20112012: 435 patents2013: 515 patents2014: 486 patents20142015: 508 patents2016: 490 patents2017: 516 patents20172018: 474 patents2019: 635 patents2020: 598 patents20202021: 472 patents2022: 425 patents2023: 366 patents20232024: 414 patents2025: 380 patents2025

Top Inventors

Rank Inventor Patents Primary Company
1 Christopher A. Wiklof 14 Clearsign Combustion
2 Frank J. Cunha 14 RTX (Raytheon)
3 Stanislav Kostka 13 RTX (Raytheon)
#4 Gregory Allen Boardman 9 GE
#5 JOSEPH COLANNINO 9 Clearsign Combustion
#6 Igor A. Krichtafovitch 8 Clearsign Combustion
#7 Andrea Ciani 7 Ansaldo Energia Switzerland Ag
#8 David William Cihlar 7 GE
#9 David Andrew Hannwacker 7 GE
#10 Mirko Ruben Bothien 7 Ansaldo Energia Switzerland Ag
#11 Pradeep Naik 7 GE
#12 Stephen John Howell 7 GE
#13 DOUGLAS W. KARKOW 6 Clearsign Combustion
#14 Jason A. Ryon 6 Delavan
#15 Jeffrey Michael Martini 6 GE
#16 Jonathan Jeffery Eastwood 6 RTX (Raytheon)
#17 Timothy S. Snyder 6 RTX (Raytheon)
#18 Bruno Schuermans 5 Alstom Technology
#19 Florent Guillou 5 Ifp Energies Nouvelles
#20 Hoyt Y. Chang 5 RTX (Raytheon)
#21 James B. Hoke 5 RTX (Raytheon)
#22 John Carl Jacobson 5 GE
#23 John S. Tu 5 RTX (Raytheon)
#24 Kevin Joseph Low 5 RTX (Raytheon)
#25 Keijiro Saito 5 Mitsubishi Electric
#26 Ron White 5 Lamplight Farms Incorporated
#27 Wei-Long Chen 5 Pro-Iroda Industries
#28 Adnan Eroglu 4 Alstom Technology
#29 Chung-Chin Huang 4 Grand Mate Co.
#30 Chin-Ying Huang 4 Grand Mate Co.
#31 Christopher Paul Willis 4 GE
#32 Dennis M. Moura 4 RTX (Raytheon)
#33 Donald Michael Corsmeier 4 GE
#34 Douglas Anthony Pennell 4 Alstom Technology
#35 Ewald Freitag 4 Ansaldo Energia Switzerland Ag
#36 Frank van Prooijen 4 Honeywell
#37 Glenn W. Kowald 4 Lennox Industries
#38 Hsing-Hsiung Huang 4 Grand Mate Co.
#39 Hsin-Ming Huang 4 Grand Mate Co.
#40 Jonathan Dwight Berry 4 GE
#41 Joshua Tyler Mook 4 GE
#42 Lev Alexander Prociw 4 Delavan
#43 Lucas John Stoia 4 GE
#44 Luis Tay Wo Chong Hilares 4 Ansaldo Energia Switzerland Ag
#45 Mahdi Yazdanpanah 4 Ifp Energies Nouvelles
#46 Michael Düsing 4 The Procter & Gamble
#47 Michael Alan Stieg 4 GE
#48 Patrick Benedict Melton 4 GE
#49 Sri Sreekanth 4 RTX (Raytheon)
#50 Tiago Sozinho 4 Ifp Energies Nouvelles
#51 Tomoya Nakata 4 Azbil
#52 Urs Benz 4 Alstom Technology
#53 Yen-Jen Yeh 4 Grand Mate Co.
#54 Aaron Michael Dziech 3 GE
#55 Anthony Pidcock 3 Rolls-Royce Plc
#56 Andre Theuer 3 Ansaldo Energia Switzerland Ag
#57 Brandon ALlanson Reynolds 3 GE
#58 David Albin Lind 3 GE
#59 Eduardo Hawie 3 RTX (Raytheon)
#60 Fei Philip Lee 3 Woodward
#61 Helene Stainton 3 Ifp Energies Nouvelles
#62 Hirokazu Takahashi 3 Ddk
#63 Jonathan David Baldiga 3 GE
#64 Jonathan M. Jause 3 RTX (Raytheon)
#65 John J. Rup, Jr. 3 RTX (Raytheon)
#66 Kei Inoue 3 Mitsubishi Electric
#67 Kiyonori Kushioka 3 Mitsubishi Hitachi Power Systems
#68 Klaus Moesl 3 Webasto Se
#69 Kuan-Chou Lin 3 Grand Mate Co.
#70 Luca Breccia 3 E.G.O. Elektro-Geraetebau Gmbh
#71 Manampathy G. Giridharan 3 GE
#72 Masashi Kiyosawa 3 Mitsubishi Electric
#73 Mark Eugene Noe 3 GE
#74 Manabu Oda 3 Mitsubishi Electric
#75 Marco Sbaffi 3
#76 Michael A. Benjamin 3 GE
#77 Michael Papple 3 RTX (Raytheon)
#78 Michael Todd Radwanski 3 GE
#79 Osami Yokota 3 Hitachi
#80 Paul I. Chandler 3 Rolls-Royce Plc
#81 Reinhard Schilp 3 Siemens Energy
#82 Remi Tsiava 3 L'Air Liquide, Societe Anonyme Pour L'Etude Et L'Exploitation Des Procedes Georges Claude
#83 Romain Nicolas Lunel 3 Snecma
#84 San Quach 3 RTX (Raytheon)
#85 Shinji Akamatsu 3 Mitsubishi Electric
#86 Shohei Numata 3 Mitsubishi Hitachi Power Systems
#87 Takahide Hasegawa 3 Noritz
#88 Tang-Yuan Luo 3 Grand Mate Co.
#89 Tetsuma TATSUMI 3 Mitsubishi Hitachi Power Systems
#90 Thomas F. Robertson 3 Fives North American Combustion
#91 Timothy A. Fox 3 Siemens Energy
#92 Vladimir Konstantinovich Khan 3 Schlumberger Technology
#93 Walter Ray Laster 3 Siemens Energy
#94 Yasuyuki Yamamoto 3 Autonetworks Technologies
#95 Yen-Wen Wang 3 RTX (Raytheon)
#96 Yoshiyuki Hagihara 3 Taiyo Nippon Sanso
#97 Aaron D. Sippel 2
#98 Akinori Hayashi 2 Mitsubishi Hitachi Power Systems
#99 Alan E. Bowser, Jr. 2 Fosbel
#100 Allen Michael Danis 2 GE

Top Companies

Rank Company Patents
1 GE 81
2 RTX (Raytheon) 72
3 Rolls-Royce Plc 26
#4 Ansaldo Energia Switzerland Ag 24
#5 Mitsubishi Hitachi Power Systems 19
#6 Clearsign Combustion 15
#7 Honeywell 13
#8 Noritz 9
#9 Delavan 8
#10 Safran Aircraft Engines 8
#11 Siemens Aktiengesellschaft 8
#12 Azbil 7
#13 Lennox Industries 7
#14 Rinnai 7
#15 Lamplight Farms Incorporated 6
#16 Rolls-Royce North America 6
#17 Siemens Energy 6
#18 Doosan Heavy Industries & Construction Co. 5
#19 Ifp Energies Nouvelles 5
#20 L'Air Liquide, Societe Anonyme Pour L'Etude Et L'Exploitation Des Procedes Georges Claude 5
#21 Mitsubishi Electric 5
#22 Gas Technology Institute 4
#23 Grand Mate Co. 4
#24 Kawasaki 4
#25 Kyungdong Navien Co. 4
#26 Rolls-Royce Deutschland 4
#27 Solar Turbines Incorporated 4
#28 Total Raffinage Chimie 4
#29 Unknown 4
#30 Whirlpool 4
#31 Air Products And Chemicals 3
#32 Ansaldo Energia Ip Uk Limited 3
#33 Korea Institute Of Energy Research 3
#34 Pro-Iroda Industries 3
#35 Saudi Arabian Oil 3
#36 Schlumberger Technology 3
#37 Taiyo Nippon Sanso 3
#38 Webasto Se 3
#39 Woodward 3
#40 LG 3
#41 Ademco 2
#42 American Air Liquide 2
#43 Babcock Power Services 2
#44 Babington Technology 2
#45 Biochar Now 2
#46 Bloom Engineering Company 2
#47 Bsh Hausgeräte Gmbh 2
#48 Capstone Turbine 2
#49 Ebara 2
#50 Fives North American Combustion 2
#51 Fives Stein 2
#52 Fosbel 2
#53 Hitachi Zosen Inova Ag 2
#54 Ihi 2
#55 Intergas Heating Assets B.V. 2
#56 Itea S.P.A 2
#57 Korea Institute Of Industrial Technology 2
#58 Kyocera 2
#59 Linde Gmbh 2
#60 Mitsubishi Heavy Industries Environmental & Chemical Engineering Co. 2
#61 Ngk Spark Plug Co. 2
#62 Praxair Technology 2
#63 Rem Technology 2
#64 Selas Heat Technology Company 2
#65 Smc 2
#66 Tenova S.P.A. 2
#67 The Babcock & Wilcox 2
#68 Thermochem Recovery International 2
#69 ExxonMobil 2
#70 Intel 2
#71 Agc Glass Europe 1
#72 Airgas 1
#73 Andritz 1
#74 Arvos Ljungstrom 1
#75 Astec Co. 1
#76 Biomass Controls 1
#77 Bond Manufacturing Co. 1
#78 Borgwarner Ludwigsburg Gmbh 1
#79 Bromic Pty Limited 1
#80 Carrier 1
#81 Central Boiler 1
#82 Chiyoda 1
#83 CEA 1
#84 Copreci, S.Coop. 1
#85 Degremont 1
#86 Detectors 1
#87 Dresser-Rand 1
#88 Drever International 1
#89 Dürr Systems Ag 1
#90 Eberspächer Climate Control Systems Gmbh 1
#91 Electrolux Appliances Aktiebolag 1
#92 Electrolux Home Products 1
#93 Emerson Electric 1
#94 Eni S.P.A. 1
#95 Ensyn Renewables 1
#96 Exponential Technologies 1
#97 Field Controls 1
#98 Fives Pillard 1
#99 Fuel Tech 1
#100 Ghp Group 1