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

Metalworking Patent Leaders in 2021 2021

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 Takashi Miyagi 7 Nippon Steel
2 Hiroki Ikuta 6 Makita
3 John Paul Leger 6 Trinity Bay Equipment Holdings
#4 Toru Hashimura 6 Kobe Steel
#5 Toshihito YABUNAKA 6 Makita
#6 Yasuhiro Maeda 6 Kobe Steel
#7 Thomas Flehmig 5 Thyssenkrupp Steel Europe Ag
#8 Thomas Froböse 5 Sandvik Materials Technology Deutschland Gmbh
#9 Yasuharu Tanaka 5 Nippon Steel
#10 Yoshiaki Nakazawa 5 Nippon Steel
#11 Zuo Xu 5 Citic Dicastal Co.
#12 Aaron E. Carstens 4 Stolle Machinery Company
#13 Kenichiro Otsuka 4 Nippon Steel
#14 Klaus Weinzierl 4 Siemens Aktiengesellschaft
#15 Kunihiro Senda 4 Jfe Steel
#16 Masanori Uesaka 4 Jfe Steel
#17 Misao Ogawa 4 Nippon Steel
#18 Michisada Yabuguchi 4 Makita
#19 Naofumi Nakamura 4 Kabushiki Kaisha Toshiba
#20 Toshimitsu Aso 4 Nippon Steel
#21 Yoshihiko Oda 4 Jfe Steel
#22 Yudai Yamamoto 4 Nisshin Steel Co.
#23 Alois Seilinger 3 Primetals Technologies Austria Gmbh
#24 Andrey M. Ilinich 3 Ford
#25 Benedikt Nillies 3 Leifeld Metal Spinning Ag
#26 Christoph Eusterwiemann 3 Broetje-Automation Gmbh
#27 Christofer HEDVALL 3 Sandvik Materials Technology Deutschland Gmbh
#28 Daniel Nierhoff 3 Thyssenkrupp Ag
#29 Dennis Cornelius Stammen 3 Stolle Machinery Company
#30 Erich Opitz 3 Primetals Technologies Austria Gmbh
#31 Florian Poeschl 3 Primetals Technologies Austria Gmbh
#32 Gregory H. Butcher 3 Stolle Machinery Company
#33 Guoyuan Xiong 3 Citic Dicastal Co.
#34 Harinder S. Oberoi 3 The Boeing
#35 Ian Kenneth Scholey 3 Stolle Machinery Company
#36 James A. McClung 3 Stolle Machinery Company
#37 Jeffrey Lawrence Miller 3 The Boeing
#38 Johannes Alken 3 Sms Group Gmbh
#39 Kenichi Watanabe 3 Fujitsu Semiconductor Limited
#40 Kwok Tung Chan 3 The Boeing
#41 Masayuki Ishizuka 3 Sumitomo Heavy Industries
#42 Martin Kibben 3 Thyssenkrupp Steel Europe Ag
#43 Masahiro Kubo 3 Nec
#44 Masayuki Saika 3 Sumitomo Heavy Industries
#45 Mikel Lee Lewis 3 Trinity Bay Equipment Holdings
#46 Mingxiang Wu 3 —
#47 Nobuyuki Hagiwara 3 Nsk
#48 Norieda Ueno 3 Sumitomo Heavy Industries
#49 Paul L. Ripple 3 Stolle Machinery Company
#50 Russell Bauer 3 Stolle Machinery Company
#51 S. George Luckey, Jr. 3 Ford
#52 Takao Kuroyanagi 3 Makita
#53 Toyohisa Shinmiya 3 Jfe Steel
#54 Toshiya Suzuki 3 Nippon Steel
#55 Yasuhiro Ito 3 Tdk
#56 Yuki Kawai 3 Makita
#57 Akira Kasahara 2 Max Co.
#58 Alan S. Draper 2 The Boeing
#59 Amanda Kay Freis 2 Ford
#60 Andreas Tripp 2 Newfrey
#61 Blake A. Simpson 2 The Boeing
#62 Bowen Xue 2 Citic Dicastal Co.
#63 Branko Sarh 2 The Boeing
#64 Bruce M. Thielges 2 Mate Precision Tooling
#65 Bunya Suemitsu 2 A.L.M.T.
#66 Casey M. Cowell 2 The Boeing
#67 Carlos Eboli 2 Novelis
#68 Chieko IMAI 2 Kobe Steel
#69 Chih-Yeh Lin 2 Asia Vital Components Co.
#70 Charles Meyer 2 Illinois Tool Works
#71 Christopher M. O'Brien 2 AMD
#72 Chunxiang Zhang 2 Yanshan University
#73 Claus Peter Matzen 2 Enkotec A/S
#74 Constantine S. Grapsas 2 A.I.M. Holding
#75 David G. Ellsworth 2 The Boeing
#76 David Michael Gregory 2 Trinity Bay Equipment Holdings
#77 Daniel A. Jansen 2 Stolle Machinery Company
#78 Daniel Knie 2 Sms Group Gmbh
#79 Florian HAUSMANN 2 Trumpf Maschinen Austria
#80 Florian Maier 2 Trumpf Maschinen Austria
#81 Florian Unger 2 Eckold Gmbh & Co. Kg
#82 Gerhard Angerer 2 Trumpf Maschinen Austria
#83 Gerhard Horn 2 Sms Group Gmbh
#84 Gilles Avrillaud 2 Adm28 S.Àr.L
#85 Gregory Gudzinski 2 The Boeing
#86 Gwan-Sik Min 2 Posco Co.
#87 Hajime Banno 2 Ihi
#88 Hayato Iwasaki 2 Kawasaki
#89 Helmut Theis 2 Trumpf Maschinen Austria
#90 Hiroto Miyake 2 Japan Display
#91 Hirokazu Ochiai 2 Taiho Kogyo Co.
#92 Hitoshi Sumiya 2 Sumitomo Electric Industries
#93 Hiroshi Yoshida 2 Kabushiki Kaisha Toshiba
#94 Hui-Seop Kwon 2 Posco Co.
#95 Huiying Liu 2 Citic Dicastal Co.
#96 Ian Breeze 2 Bowman International Limited
#97 Ivan Viaux 2 Arcelormittal
#98 Jeffrey Martin Devlin 2 The Boeing
#99 Jian Cao 2 Northwestern University
#100 Jian Chen 2 Fuji Electric Co.

Top Companies

Rank ↑ Company ↕ Patents ↕
1 Nippon Steel 24
2 The Boeing 17
3 Sms Group Gmbh 16
#4 Ford 13
#5 Stolle Machinery Company 11
#6 Toyota 11
#7 Jfe Steel 10
#8 Citic Dicastal Co. 8
#9 Hitachi 8
#10 Kobe Steel 8
#11 Makita 7
#12 Primetals Technologies Austria Gmbh 7
#13 Trinity Bay Equipment Holdings 7
#14 Thyssenkrupp Ag 6
#15 Trumpf Maschinen Austria 6
#16 Honda Motor Co. 5
#17 Magna International 5
#18 Mitsubishi Electric 5
#19 Primetals Technologies Germany Gmbh 5
#20 Sandvik Materials Technology Deutschland Gmbh 5
#21 Thyssenkrupp Steel Europe Ag 5
#22 Böllhoff Verbindungstechnik Gmbh 4
#23 Danieli & C. Officine Meccaniche S.P.A. 4
#24 Hyundai Motor 4
#25 Kia Motors 4
#26 Newfrey 4
#27 RTX (Raytheon) 4
#28 Aida Engineering 3
#29 BMW 3
#30 Benteler Automobiltechnik Gmbh 3
#31 Broetje-Automation Gmbh 3
#32 Crown Packaging Technology 3
#33 Kawasaki 3
#34 Komatsu 3
#35 Leifeld Metal Spinning Ag 3
#36 Mazda Motor 3
#37 Nisshin Steel Co. 3
#38 Northwestern University 3
#39 Novelis 3
#40 Nsk 3
#41 Sandvik Intellectual Property Ab 3
#42 Schuler Pressen Gmbh 3
#43 Sumitomo Heavy Industries 3
#44 Toshiba Mitsubishi-Electric Industrial Systems 3
#45 US Air Force 3
#46 Unknown 3
#47 AMD 2
#48 Adm28 S.Àr.L 2
#49 A.L.M.T. 2
#50 Amada Co. 2
#51 American Axle & Manufacturing 2
#52 Arcelormittal 2
#53 Asia Vital Components Co. 2
#54 Baoshan Iron & Steel Co. 2
#55 Bowman International Limited 2
#56 Bystronic Laser Ag 2
#57 Daiwa Can 2
#58 Eckold Gmbh & Co. Kg 2
#59 Enkotec A/S 2
#60 Exco Technologies Limited 2
#61 Gripmetal Limited 2
#62 Hidaka Seiki Kabushiki Kaisha 2
#63 Hubbell Incorporated 2
#64 Illinois Tool Works 2
#65 Langenstein & Schemann Gmbh 2
#66 Mate Precision Technologies 2
#67 Max Co. 2
#68 Milwaukee Electric Tool 2
#69 Mitsubishi Aluminum Co. 2
#70 Ms Autotech Co. 2
#71 Posco Co. 2
#72 Sanoh Industrial Co. 2
#73 Subaru 2
#74 Sumitomo Electric Industries 2
#75 Taiho Kogyo Co. 2
#76 Toyo Seikan Co. 2
#77 Trumpf Werkzeugmaschinen Gmbh + Co. Kg 2
#78 Uniflex-Hydraulik Gmbh 2
#79 Yanshan University 2
#80 GE 2
#81 General Motors 2
#82 LG 2
#83 Aalto University Foundation Sr 1
#84 Absolicon Solar Collector Ab 1
#85 Afl Telecommunications 1
#86 Ags Company Automotive Solutions 1
#87 Airbus Operations Sas 1
#88 Aisin Keikinzoku Co. 1
#89 Alcoa 1
#90 Alfa Laval Corporate Ab 1
#91 Alfons Haar 1
#92 Amsted Rail Company 1
#93 Apex Brands 1
#94 Aptiv Technologies Ag 1
#95 Ardagh Mp Group Netherlands B.V. 1
#96 Astes4 Sa 1
#97 Atlas Copco Ias Uk Limited 1
#98 Autotech Engineering S.L. 1
#99 Avdel Uk Limited 1
#100 Ball 1