Locks keys and doors Patent Leaders

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: 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Patents per Year

Top Inventors

Rank ↑	Inventor ↕	Patents ↕	Primary Company ↕
1	Luciano Salice	87	Arturo Salice S.P.A.
2	Lee S. Weinerman	69	The Eastern
3	Dieter Ramsauer	64	Dirak Dieter Ramsauer Konstruktionselemente Gmbh
#4	Luke Liang	61	Vision Industries Group
#5	James J. Fitzgibbon	60	The Chamberlain Group
#6	Thorsten Bendel	57	Kiekert Ag
#7	Chun-Te Yu	55	Aleddra
#8	Kosta Papanikolaou	55	Ford
#9	Lloyd Walker Rogers, Jr.	54	General Motors
#10	Dennis D. Belden, Jr.	51	Checkpoint Systems
#11	Ryoichi Fukumoto	51	Aisin Seiki Kabushiki Kaisha
#12	Christopher J. Fawcett	49	Invue Security Products
#13	Erich Rock	49	Julius Blum Gesellschaft M.B.H.
#14	Francesco Cumbo	49	Magna Closures
#15	Chao-Ming Huang	47	Taiwan Fu Hsing Industrial Co.
#16	Michael Scholz	47	Kiekert Ag
#17	Willis Jay Mullet	47	Wayne-Dalton
#18	Bo Widen	46	Winloc Ag
#19	Donald Michael Perkins	46	Inteva Products
#20	Mu-Lin Shen	46	I-Tek Metal Mfg. Co.
#21	David Chen	44	Vision Industries Group
#22	Frank Kleefeldt	44	Kiekert Gmbh & Co. Kommanditgesellschaft
#23	George Frolov	43	Harrow Products
#24	Karl Lai	42	The Sun Lock Company Limited
#25	Holger Schiffer	41	Kiekert Ag
#26	William R. Foshee	40	Best Lock
#27	Ronald M. Marsilio	38	Invue Security Products
#28	Nigel Spurr	37	Meritor Light Vehicle Systems (Uk) Limited
#29	David Rosales	36	Brose Schließsysteme Gmbh & Co. Kommanditgesellschaft
#30	Nicholas M. Sedon	36	Alpha Security Products
#31	Gerhard Lautenschlager	35	Mepla-Werke Lautenschlager
#32	J. Clayton Miller	35	Cm Tech Co.
#33	Karl Lautenschlager	35	Karl Lautenschlager Gmbh & Co. Kg Mobelbeschlagfabrik
#34	Tong Liang	35	Vision Industries Group
#35	David Geringer	34	Security Door Controls
#36	Gregory J. Vetter	34	Truth Hardware
#37	Alan K. Uyeda	33	Adams Rite Manufacturing
#38	Jay S. Derman	33	Acco Brands
#39	Klaus Brustle	33	Julius Blum Gesellschaft M.B.H.
#40	Klaus W. Gartner	33	La Gard
#41	Martin Lindmayer	33	Mercedes-Benz Group Ag
#42	Anthony Guerin	32	U-Shin Italia S.P.A
#43	Carlo Migli	32	Unknown
#44	Frank Joseph Arabia, Jr.	32	General Motors
#45	Horst Lautenschlager	32	Mepla-Werke Lautenschlager
#46	Ömer Inan	32	Kiekert Ag
#47	Aaron P. McKibben	31	Schlage Lock Company
#48	Arthur Geringer	31	Security Door Controls
#49	Gerald Chong	31	Newfrey
#50	Jeffrey L. Konchan	31	General Motors
#51	Georg Domenig	30	Grass America
#52	Jui-Chang Lin	30	Taiwan Fu Hsing Industry Co.
#53	Kenton H. Barker	30	Schlage Lock Company
#54	Kris Tomaszewski	30	Magna Closures
#55	Luciano Bacchetti	30	In & Tec S.R.L.
#56	Roman Cetnar	30	Atoma International
#57	Shigeru Hayakawa	30	Aisin Seiki Kabushiki Kaisha
#58	Barry G. Lawrence	29	Hughes Supply Company Of Thomasville
#59	Ching-Chuan Kuo	29	O2Micro
#60	Chong-Kuan Ling	29	Sinox Company
#61	Gary L. Myers	29	Fort Lock
#62	Hung-Jen Tien	29	I-Tek Metal Mfg. Co.
#63	Kazuhito Yokomori	29	Mitsui Kinzoku Kogyo
#64	Ludger Graute	29	Kiekert Ag
#65	Peter H. Field	29	Medeco Security Locks
#66	Yasuhiko Sono	29	Aisin Seiki Kabushiki Kaisha
#67	Brian C. Eickhoff	28	Schlage Lock Company
#68	David R. Hall	28	Hall Labs
#69	Joseph Talpe	28	Locinox
#70	Kevin L. Parsons	28	NVIDIA
#71	Paul R. Arlinghaus	28	Schlage Lock Company
#72	Robert J. Hunt	28	Kiekert Ag
#73	Ryujiro Akizuki	28	Aisin Seiki Kabushiki Kaisha
#74	Scott A. Arthurs	28	The Eastern
#75	Dongjeong Kim	27	LG
#76	Gerard Prevot	27	Ferco International Ferrures Et Serrures De Batiment
#77	Jeffrey A. Grant	27	Invue Security Products
#78	Ken-Ching Chen	27	King Slide Works Co.
#79	Richard Geringer	27	Security Door Controls
#80	Stuart C. Salter	27	Ford
#81	Wilbur James Kellum, III	27	Amesbury Group
#82	Dominik Scheffler	26	Hanchett Entry Systems
#83	Gary E. Tagtow	26	Amesbury Group
#84	Takashi Nishio	26	Aisin Seiki Kabushiki Kaisha
#85	Akira Muramatsu	25	Aisin Seiki Kabushiki Kaisha
#86	Alfred Grass	25	Grass Gmbh
#87	Asil T. Gokcebay	25	Digilock Asia
#88	Burl Finkelstein	25	Kason Industries
#89	Darren C. Eller	25	Sargent Manufacturing
#90	Jack R. Lehner, Jr.	25	Schlage Lock Company
#91	Jerome Miles	25	Hall Labs
#92	Michael W. Kondratuk	25	Larson Manufacturing Company Of South Dakota
#93	Miko Lee	25	Aba Ufo International
#94	Rajesh K. Patel	25	Ford
#95	Vijayakumar Mani	25	Schlage Lock Company
#96	Bernd Weyerstall	24	Robert Bosch Gmbh
#97	Ching-Tien Lin	24	Thase Enterprise Co.
#98	Chun-Chiang Wang	24	King Slide Works Co.
#99	Helmut Rupprechter	24	Julius Blum Gesellschaft M.B.H.
#100	Marco Taurasi	24	Magna Closures

Top Companies

Rank ↑	Company ↕	Patents ↕
1	General Motors	527
2	Schlage Lock Company	483
3	Unknown	423
#4	Ford	408
#5	Kiekert Ag	384
#6	Aisin Seiki Kabushiki Kaisha	355
#7	Hyundai Motor	280
#8	Honda Motor Co.	220
#9	Southco	195
#10	Toyota	188
#11	Magna Closures	177
#12	Julius Blum Gmbh	162
#13	Huf Huelsbeck & Fuerst GmbH & Co. KG	160
#14	Mitsui Kinzoku Act	146
#15	Illinois Tool Works	140
#16	Ohi Seisakusho Co.	129
#17	The Chamberlain Group	129
#18	The Eastern	125
#19	Mitsui Kinzoku Kogyo	121
#20	Kia Motors	119
#21	Taiwan Fu Hsing Industrial Co.	108
#22	Dorma Gmbh + Co. Kg	102
#23	Nifco	96
#24	Master Lock Company	95
#25	Inteva Products	93
#26	Truth Hardware	93
#27	Sargent Manufacturing	92
#28	Arturo Salice S.P.A.	85
#29	Nissan Motor Co.	85
#30	Emhart	83
#31	I-Tek Metal Mfg. Co.	82
#32	Alpha	80
#33	Robert Bosch Gmbh	79
#34	Samsung	78
#35	Assa Abloy Entrance Systems Ab	77
#36	Checkpoint Systems	77
#37	Chrysler Group	77
#38	Hartwell	76
#39	LG	75
#40	Hanchett Entry Systems	74
#41	Overhead Door	74
#42	Acco Brands	72
#43	Julius Blum Gesellschaft M.B.H.	71
#44	Mitsubishi Electric	69
#45	Amesbury Group	68
#46	Mitsui Mining & Smelting Co.	67
#47	The Boeing	67
#48	Black & Decker	66
#49	Sugatsune Kogyo Co.	66
#50	Newfrey	65
#51	Whirlpool	65
#52	Delphi Technologies	64
#53	Tong Lung Metal Industry Co.	62
#54	Trimark	62
#55	Yale Security	61
#56	Abus August Bremicker Söhne Kg	60
#57	Sensormatic Electronics	60
#58	Von Duprin	60
#59	Abloy Oy	59
#60	Daimlerchrysler Ag	58
#61	Kia	58
#62	Stabilus Gmbh	58
#63	Takigen Manufacturing Co.	58
#64	Best Lock	57
#65	Newell Operating	57
#66	Grass Gmbh	55
#67	Wayne-Dalton	55
#68	Brose Schliessysteme	53
#69	Valeo Securite Habitacle	53
#70	Aisin	52
#71	Asmo Co.	52
#72	Kabushiki Kaisha Honda Lock	52
#73	Mitsuba	52
#74	Vision Industries Group	52
#75	Spectrum Brands	51
#76	Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft	50
#77	Piolax	50
#78	Brose Fahrzeugteile Se & Co. Kommanditgesellschaft, Bamberg	49
#79	Andersen	48
#80	Atoma International	48
#81	Sinox Company	48
#82	IBM	48
#83	The Sun Lock Company Limited	47
#84	Caldwell Manufacturing	46
#85	Harrow Products	45
#86	Daimler-Benz Ag	44
#87	Foxconn	44
#88	Medeco Security Locks	43
#89	Dr. Ing. H.C. F. Porsche Ag	42
#90	Ashland	41
#91	Sargent & Greenleaf	41
#92	Won-Door	40
#93	GE	40
#94	Adac Plastics	39
#95	Geze Gmbh	39
#96	Pyeong Hwa Automotive Co.	39
#97	U-Shin Italia S.P.A	39
#98	Intier Automotive Closures	37
#99	Invue Security Products	37
#100	Strattec Security	37

Locks keys and doors Patent Leaders All Time

Patents per Year

Top Inventors

Top Companies