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Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Technologies › Roads railways and bridges

Roads railways and bridges Patent Leaders All Time

Primary CPC class E01 · 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 518 patents in 2019.peak 5181996: 362 patents19961997: 294 patents1998: 339 patents1999: 341 patents19992000: 356 patents2001: 347 patents2002: 394 patents20022003: 346 patents2004: 328 patents2005: 268 patents20052006: 308 patents2007: 262 patents2008: 241 patents20082009: 307 patents2010: 393 patents2011: 372 patents20112012: 360 patents2013: 439 patents2014: 430 patents20142015: 426 patents2016: 436 patents2017: 460 patents20172018: 469 patents2019: 518 patents2020: 488 patents20202021: 444 patents2022: 413 patents2023: 406 patents20232024: 413 patents2025: 430 patents2025

Top Inventors

Rank ↑ Inventor ↕ Patents ↕ Primary Company ↕
1 Josef Theurer 302 Franz Plasser Bahnbaumaschinen-Industrie-Gesellschaft Mbh
2 Cyrus Barimani 138 Wirtgen Gmbh
3 Christian Berning 112 Wirtgen Gmbh
#4 Günter Hähn 78 Wirtgen Gmbh
#5 Manfred Brunninger 55 Franz Plasser Bahnbaumaschinen-Industrie-Gesellschaft Mbh
#6 Jack H. Kulp 51 Traffix Devices
#7 Martin Buschmann 48 Joseph Voegele Ag
#8 Herbert Worgotter 43 Franz Plasser Bahnbaumaschinen-Industrie-Gesellschaft Mbh
#9 Donald R. High 42 Walmart Apollo
#10 William H. Neusch 42 Neusch Innovations, Lp
#11 David R. Hall 37 Hall Labs
#12 Dieter Simons 37 Wirtgen Gmbh
#13 Geoffrey B. Maus 35 Traffix Devices
#14 Bernhard Lichtberger 34 Franz Plasser Bahnbaumaschinen-Industrie-Gesellschaft Mbh
#15 Joseph E. Musil 34 Cedarapids
#16 John L. Marsolek 33 Caterpillar
#17 Dean L. Sicking 32 Safety By Design
#18 Philip J. Quenzi 32 Somero Enterprises
#19 Friedrich Oellerer 31 Franz Plasser Bahnbaumaschinen-Industrie-Gesellschaft Mbh
#20 Michael D. Atchley 31 Walmart Apollo
#21 Dallas James 30 Valmont Highway Technology Limited
#22 David C. Winkle 30 Walmart Apollo
#23 Dean C. Alberson 30 Texas A&M University System
#24 Toby A. Frelich 30 Caterpillar
#25 Kevin K. Groeneweg 29 Concaten
#26 Ronald D. Shaw 28 Shaw & Sons
#27 James A. Remington 27 Cleveland Track Material
#28 J. Dewayne Allen 27 Allen Engineering
#29 George W. Swisher, Jr. 26 —
#30 Peter Busley 26 Wirtgen Gmbh
#31 Ralf Weiser 26 Joseph Voegele Ag
#32 Daniel C. Sawyer 25 Brock Usa
#33 Jason W. Muir 25 Caterpillar
#34 Stephen John Cox 25 Pandrol Limited
#35 Herbert Ley 24 Wirtgen Gmbh
#36 Lee A. Shaw 24 Lithocrete
#37 Nicholas A. Oetken 24 Caterpillar
#38 Roger P. Bligh 24 Texas A&M University System
#39 David C. Gertz 23 Traffix Devices
#40 Felipe Almanza 23 Traffix Devices
#41 Richard R. Runkles 23 Brock Usa
#42 Steven Lee Sawyer 23 Brock Usa
#43 Winfried Bösterling 23 Vossloh-Werke Gmbh
#44 Achim Eul 22 Joseph Voegele Ag
#45 Christoph Menzenbach 22 Wirtgen Gmbh
#46 D. Lance Bullard, Jr. 22 Texas A&M University System
#47 Eric S. Engelmann 22 Caterpillar
#48 Hartley F. Young 22 Ralph Mckay Limited
#49 Johann Hansmann 22 Franz Plasser Bahnbaumaschinen-Industrie-Gesellschaft Mbh
#50 Terry C. Wendorff 22 Sno-Way International
#51 Friedrich Peitl 21 Franz Plasser Bahnbaumaschinen-Industrie-Gesellschaft Mbh
#52 Joe PENLAND, JR. 21 Quality Mat
#53 Matthias Fritz 21 Wirtgen Gmbh
#54 Martin Lenz 21 Wirtgen Gmbh
#55 Mark A. Pietila 21 Somero Enterprises
#56 Nathaniel S. Doy 21 Caterpillar
#57 Brian J. Schlenker 20 Caterpillar
#58 Carl B. Kieranen 20 Somero Enterprises
#59 Charles M. Schmeichel 20 Agri-Cover
#60 Ivan E. Bounds 20 Herzog Contracting
#61 John D. Reid 20 Safety By Design
#62 Guenter Haehn 19 Wirtgen Gmbh
#63 Olaf Gaertner 19 Wirtgen Gmbh
#64 Robert N. Gamble, II 19 Sno-Way International
#65 C. Eugene Buth 18 Texas A&M University System
#66 James R. Albritton 18 Exodyne Technologies
#67 Karsten Buhr 18 Wirtgen Gmbh
#68 Lynn W. Schultz 18 Sno-Way International
#69 Philip D. Halonen 18 Somero Enterprises
#70 Ronald M. Guntert, Jr. 18 Guntert & Zimmerman Const. Div.
#71 Robert C. Taylor 18 Walmart Apollo
#72 Tim Sylvester 18 Integrated Roadways
#73 Andreas Salz 17 Wirtgen Gmbh
#74 David Wahlquist 17 Schlumberger Technology
#75 Hayes E. Ross, Jr. 17 Texas A&M University System
#76 James A. Kost 17 Louis Berkman
#77 James C. Schroeder 17 Graco Minnesota
#78 Jameson Michael Smieja 17 Caterpillar
#79 Kenneth Szekely 17 Astra Capital Incorporated
#80 Patrick A. Leonhardt 17 Energy Absorption Systems
#81 Peter J. Smith 17 The Fort Miller Co.
#82 Romolo Panetti 17 Speno International S.A.
#83 Steven R. Robinson 17 Schul International Co.
#84 Thomas Lehnert 17 Wirtgen Gmbh
#85 William B. Coe 17 —
#86 David N. Bloxdorf 16 Douglas Dynamics, L.L.C.
#87 Gerrit A. Dyke 16 Lindsay Transportation Solutions
#88 Hans-Norbert Wiedeck 16 Krupp Fordertechnik Gmbh
#89 John E. Jorgensen 16 Caterpillar
#90 John W. Mospan 16 Portec Rail Products
#91 Andreas Vogt 15 Wirtgen Gmbh
#92 Bertin Castonguay 15 Oldcastle Building Products Canada
#93 Chad M. Thiesse 15 Caterpillar
#94 Jean Muller 15 Figg And Muller Engineers
#95 Jeremy Smith 15 Traffix Devices
#96 Jerome Stubler 15 Freyssinet International (Stup)
#97 John R. Rohde 15 Safety By Design
#98 Lee M. Hogan 15 Caterpillar
#99 Marvin Keller Exline 15 Heritage Research Group
#100 Philip Verhaelen 15 Wirtgen Gmbh

Top Companies

Rank ↑ Company ↕ Patents ↕
1 Caterpillar 404
2 Franz Plasser Bahnbaumaschinen-Industrie-Gesellschaft Mbh 306
3 Wirtgen Gmbh 291
#4 Unknown 261
#5 Joseph Voegele Ag 104
#6 Bomag Gmbh 103
#7 Honda Motor Co. 85
#8 Energy Absorption Systems 68
#9 Pandrol Limited 66
#10 Traffix Devices 63
#11 3M 61
#12 Harsco 56
#13 The Toro 51
#14 Texas A&M University System 49
#15 Astec International Limited 46
#16 Nordco 45
#17 Vossloh-Werke Gmbh 44
#18 Plasser & Theurer Export Von Bahnbaumaschinen Gesellschaft M.B.H. 43
#19 Hamm Ag 42
#20 Tennant 42
#21 Walmart Apollo 41
#22 Sno-Way International 40
#23 Brock Usa 35
#24 Volvo Construction Equipment Ab 35
#25 Cummins 34
#26 Gomaco 33
#27 Illinois Tool Works 33
#28 Roadtec 31
#29 Douglas Dynamics, L.L.C. 30
#30 Matisa Matériel Industriel S.A. 29
#31 Allen Engineering 28
#32 Concaten 28
#33 Cedarapids 26
#34 Louis Berkman 26
#35 Progress Rail Services 26
#36 US Army 26
#37 Somero Enterprises 25
#38 Canron 24
#39 Graco Minnesota 24
#40 Lindsay Transportation Solutions 24
#41 Briggs & Stratton 22
#42 Dyckerhoff & Widmann 22
#43 Ingersoll-Rand 22
#44 Comcast 22
#45 Loram Maintenance Of Way 21
#46 Meyer Products 21
#47 Speno International S.A. 21
#48 Freyssinet International (Stup) 20
#49 Neusch Innovations, Lp 20
#50 Agri-Cover 19
#51 Guntert & Zimmerman Const. Div. 19
#52 Owens-Corning Fiberglas 19
#53 Abg Allgemeine Baumaschinen-Gesellschaft Mbh 18
#54 Barrier Systems 18
#55 B & B Metals 18
#56 Blaw-Know Construction Equipment 18
#57 Mtd Products 18
#58 Quality Mat 18
#59 Oldcastle Building Products Canada 17
#60 Plasser & Theurer Export Von Bahnbaumaschinen Gmbh 17
#61 Racine Railroad Products 17
#62 Shaw & Sons 17
#63 Vae Gmbh 17
#64 Valmont Highway Technology Limited 17
#65 Paul Kristen 16
#66 Schul International Co. 16
#67 Soletanche Freyssinet 16
#68 Cives 15
#69 Cleveland Track Material 15
#70 Integrated Roadways 15
#71 Robel Bahnbaumaschinen Gmbh 15
#72 Schwihag Ag 15
#73 Toyota 15
#74 Bwg Butzbacher Weichenbau Gmbh 14
#75 F. Von Langsdorf Licensing Limited 14
#76 Heritage Research Group 14
#77 Herzog Contracting 14
#78 Kershaw Manufacturing 14
#79 Les Fils D'Auguste Scheuchzer S.A. 14
#80 Pactec 14
#81 Trn Business Trust 14
#82 Tymco 14
#83 Vsl International Ag 14
#84 University Of Nebraska 13
#85 Mccue 13
#86 Midwest Industrial Supply 13
#87 Moba Mobile Automation Ag 13
#88 Off The Wall Products 13
#89 Plastic Safety Systems 13
#90 Sakai Heavy Industries 13
#91 Schwarze Industries 13
#92 Terex Usa 13
#93 Astra Capital Incorporated 12
#94 Black & Decker 12
#95 Federal Signal 12
#96 Herzog Railroad Services 12
#97 L.B. Foster 12
#98 Newpark Mats & Integrated Services 12
#99 Polytex Sportbeläge Produktions-Gmbh 12
#100 Ten Cate Thiolon B.V. 12