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Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Technologies › Metalworking

Metalworking Patent Leaders in 2019 2019

Primary CPC class B21 · Section B

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 711 patents in 1999.peak 7111996: 473 patents19961997: 531 patents1998: 624 patents1999: 711 patents19992000: 636 patents2001: 629 patents2002: 532 patents20022003: 528 patents2004: 497 patents2005: 386 patents20052006: 557 patents2007: 450 patents2008: 362 patents20082009: 337 patents2010: 402 patents2011: 417 patents20112012: 523 patents2013: 562 patents2014: 487 patents20142015: 524 patents2016: 549 patents2017: 599 patents20172018: 507 patents2019: 628 patents2020: 582 patents20202021: 594 patents2022: 641 patents2023: 612 patents20232024: 529 patents2025: 502 patents2025

Top Inventors

Rank ↑ Inventor ↕ Patents ↕ Primary Company ↕
1 Yoshiaki Nakazawa 7 Nippon Steel
2 Junichi Okubo 6 Nippon Steel
3 Kazuyuki HIRATA 6 Toyota
#4 Kenji Tamura 6 Honda Motor Co.
#5 Eric D. Smith 5 Keystone Tower Systems
#6 Joel T. Pyper 5 Standard Lifters
#7 Kazuto Kobayashi 5 Fujikoki
#8 Rosalind K. Takata 5 Keystone Tower Systems
#9 Scott M. Breen 5 Standard Lifters
#10 Conrad ERNST DE LA GRAETE 4 Fives Dms
#11 Hiroyuki Kurokawa 4 Toyota
#12 Ken-ichiro Yoshino 4 Topcon
#13 Koichiro Ishihara 4 Nippon Steel
#14 Kunihiro Yabuno 4 Nippon Steel
#15 Loren Daniel Bridgers 4 Keystone Tower Systems
#16 Sho Takamoto 4 Nippon Steel
#17 S. George Luckey, Jr. 4 Ford
#18 Takashi Miyagi 4 Nippon Steel
#19 Takeharu Yamamoto 4 Sumitomo Electric Industries
#20 Toyohisa Shinmiya 4 Jfe Steel
#21 Tomohisa Yamashita 4 Kabushiki Kaisha Toshiba
#22 Yuji Yamasaki 4 Jfe Steel
#23 Adam Kettles 3 Unknown
#24 Alan S. Draper 3 The Boeing
#25 Atsushi Tomizawa 3 Nippon Steel & Sumitomo Metal
#26 Douglas R. Dole 3 Victaulic
#27 Eiji Iizuka 3 Jfe Steel
#28 Georg Frost 3 Benteler Automobiltechnik Gmbh
#29 Giorgio Del Fabro 3 M.E.P. Macchine Elettroniche Piegatrici S. P.A.
#30 Hayato Iwasaki 3 Kawasaki
#31 Harinder S. Oberoi 3 The Boeing
#32 Hiroshi Kitano 3 Panasonic
#33 Hiroshi Koyama 3 Mitsubishi Electric
#34 Hiroshi Matsumoto 3 Nuflare Technology
#35 Hiroshi Yoshida 3 Kabushiki Kaisha Toshiba
#36 Jeffrey J. Plummer 3 Greenlee Texron
#37 Jim Flanagan 3 Unknown
#38 Kohei MIKAMI 3 Kawasaki
#39 Mark Doll 3 Alcatel Lucent
#40 Masaaki Sato 3 Canon
#41 Michael H. Honsel 3 M. H. Honsel Beteiligungs Gmbh
#42 Naofumi Nakamura 3 Kabushiki Kaisha Toshiba
#43 Nobuyuki Hagiwara 3 Nsk
#44 Raja K. Mishra 3 General Motors
#45 Raj Sohmshetty 3 Ford
#46 Sean A. Daugherty 3 Rai Strategic Holdings
#47 Takeshi Chiba 3 Kaneka
#48 Takayuki Endo 3 Nidec Copal Electronics
#49 Takao Uchiyama 3 Jfe Steel
#50 Thomas Denkmeier 3 Trumpf Maschinen Austria
#51 Toshiya Suzuki 3 Nippon Steel
#52 Tracy Jay Fowler 3 Stolle Machinery Company
#53 Tsutomu Sugiyama 3 Jfe Steel
#54 Wu Sheng Huang 3 Yung Chi Industry Co.
#55 Yasuyuki Kohno 3 Aida Engineering
#56 Yoshihide Imamura 3 Kawasaki
#57 Yuto Sakane 3 Kawasaki
#58 Yudai Yamamoto 3 Nisshin Steel Co.
#59 Zebula Doll 3 Unknown
#60 Akinobu Ishiwatari 2 Jfe Steel
#61 Alfredo Jose Gerosa 2 The Boeing
#62 Alfred Haselboeck 2 Trumpf Maschinen Austria
#63 Alexander H. Slocum 2 MIT
#64 Andrey M. Ilinich 2 Ford
#65 Anil K. Sachdev 2 General Motors
#66 Brandon Hendrickson Bodily 2 —
#67 Bryan L. Rogers 2 Wilson Tool International
#68 Branko Sarh 2 The Boeing
#69 Bruce M. Thielges 2 Mate Precision Tooling
#70 Christian Charbon 2 Nivarox-Far S.A.
#71 Charles L. Stewart 2 Manchester Copper Products
#72 Constantin Chiriac 2 Ford
#73 Daniel Ainge 2 Keystone Tower Systems
#74 Domenico Fulco 2 —
#75 Dustin M. Bush 2 Alcoa
#76 Edward L. Colvin 2 Aluminum Company Of America
#77 Egbert Frenken 2 Gustav Klauke Gmbh
#78 Eric V. Roegner 2 —
#79 Frank Schmauder 2 Trumpf Werkzeugmaschinen Gmbh + Co. Kg
#80 Gerald Tully 2 Greenlee Tools
#81 Gregory S. Smith 2 General Motors
#82 Hiroyuki Imanari 2 Toshiba Mitsubishi-Electric Industrial Systems
#83 Hidemasa Kodama 2 Jfe Steel
#84 Hong Kyo Jin 2 Ms Autotech Co.
#85 Hua Yun Hsin 2 —
#86 Hyun Gyung Kim 2 Hyundai Motor
#87 Ian Breeze 2 Bowman International Limited
#88 Il-Sin Bae 2 Posco Co.
#89 Isao Shintou 2 Nsk
#90 Janko Banik 2 Thyssenkrupp Steel Europe Ag
#91 Jea-Sook CHUNG 2 Posco Co.
#92 Jeffrey Lawrence Miller 2 The Boeing
#93 Jiri Babej 2 Profil Verbindungstechnik
#94 Jiro Hiramoto 2 Jfe Steel
#95 Jianmin Yu 2 North University Of China
#96 John E. Adams 2 —
#97 Johannes Alken 2 Sms Group Gmbh
#98 Jorge Alberto Arriaga 2 The Boeing
#99 Jun Kurobe 2 Nisshin Steel Co.
#100 Jun Zhou 2 On-Bright Electronics (Shanghai) Co.

Top Companies

Rank ↑ Company ↕ Patents ↕
1 Nippon Steel & Sumitomo Metal 19
2 Nippon Steel 17
3 Jfe Steel 14
#4 The Boeing 14
#5 Sms Group Gmbh 13
#6 Ford 13
#7 Toyota 13
#8 General Motors 10
#9 Amada Co. 9
#10 Trumpf Maschinen Austria 9
#11 Benteler Automobiltechnik Gmbh 8
#12 Trumpf Werkzeugmaschinen Gmbh + Co. Kg 8
#13 Aida Engineering 7
#14 Danieli & C. Officine Meccaniche S.P.A. 7
#15 Thyssenkrupp Steel Europe Ag 7
#16 Unknown 7
#17 Honda Motor Co. 6
#18 Hyundai Motor 6
#19 Nsk 6
#20 Stolle Machinery Company 6
#21 Keystone Tower Systems 5
#22 Primetals Technologies Austria Gmbh 5
#23 Primetals Technologies Japan 5
#24 Standard Lifters 5
#25 Denso 4
#26 Fives Dms 4
#27 Greenlee Tools 4
#28 Kia Motors 4
#29 Komatsu 4
#30 Mitsubishi Electric 4
#31 Primetals Technologies Germany Gmbh 4
#32 Toshiba Mitsubishi-Electric Industrial Systems 4
#33 Ube Machinery Corporation 4
#34 Victaulic 4
#35 Alcoa 3
#36 BMW 3
#37 Belvac Production Machinery 3
#38 Citic Dicastal Co. 3
#39 Crown Packaging Technology 3
#40 Kawasaki 3
#41 Newfrey 3
#42 Nippon Steel Nisshin Co. 3
#43 Nissan Motor Co. 3
#44 Shiroki 3
#45 Sungwoo Hitech Co. 3
#46 The Bradbury Co. 3
#47 Thyssenkrupp Ag 3
#48 Yung Chi Industry Co. 3
#49 Acergy France Sas 2
#50 Adm28 S.Àr.L 2
#51 Atlas Copco Ias Uk Limited 2
#52 Bowman International Limited 2
#53 Btm Company 2
#54 Eaton 2
#55 Gustav Klauke Gmbh 2
#56 Hidaka Seiki Kabushiki Kaisha 2
#57 Hitachi 2
#58 Hyperion Materials & Technologies (Sweden) Ab 2
#59 Illinois Tool Works 2
#60 Johnson Controls Technology 2
#61 Kuroda Precision Industries 2
#62 Manchester Copper Products 2
#63 Mate Precision Tooling 2
#64 M.E.P. Macchine Elettroniche Piegatrici S. P.A. 2
#65 Milwaukee Electric Tool 2
#66 Mitsui High-Tec 2
#67 Ms Autotech Co. 2
#68 National Machine 2
#69 Nittan Valve Co. 2
#70 Nivarox-Far S.A. 2
#71 North University Of China 2
#72 Novelis 2
#73 Posco Co. 2
#74 Primetals Technologies Usa 2
#75 Profil Verbindungstechnik 2
#76 Sumitomo Heavy Industries 2
#77 Tox Pressotechnik Gmbh & Co. Kg 2
#78 Wilson Tool International 2
#79 Yazaki 2
#80 Coca-Cola 2
#81 AMD 1
#82 Apple 1
#83 Aisin Keikinzoku Co. 1
#84 Aisin Seiki Kabushiki Kaisha 1
#85 Aleris Rolled Products Germany Gmbh 1
#86 Arcelormittal 1
#87 Asahi-Seiki Manufacturing Co. 1
#88 Asmag-Holding Gmbh 1
#89 Audi Ag 1
#90 Autotech Engineering A.I.E. 1
#91 Avdel Uk Limited 1
#92 Baker Hughes Holdings 1
#93 Ball 1
#94 Barnes Group 1
#95 Battelle Memorial Institute 1
#96 Bilstein Gmbh & Co. Kg 1
#97 Brazeway 1
#98 Bridgestone 1
#99 Bystronic Laser Ag 1
#100 Cambridge Enterprise Limited 1