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Top 100 Key Players companies in NOx
by Most Patent Filings in the world in 2019

The NOx top 100 is Discovery PatSnap’ annual ranking of the top 100 Most Patent Filings NOx Key Players in the world. Discovery has identified the top key players, startups & unicorns, fast-growings, news entrants in 2019, ranking from differnt perspectives, including patent filing intensity, academic research capability, news media heat. The company list is generated from various data types.
In atmospheric chemistry, NO x is a generic term for the nitrogen oxides that are most relevant for air pollution, namely nitric oxide (NO) and nitrogen dioxide (NO 2 ). These gases contribute to the formation of smog and acid rain, as well as affecting tropospheric ozone.

Key Players

Fast-growings

Startups & Unicorns

New Entrants

Ranking Year:

2022

2021

2020

2019

2018

Region:

Global

China

Japan

United Kingdom

United States

South Korea

Denmark

Italy

Germany

Sweden

France

Netherlands

Switzerland

Finland

Ranking:

Most Patent Filings

Highest Patent Value

Most Patent Citation

Most Research Publications

Most Literature Citation

Most Market Reports

Most News Heat

#
Company Name
Region
Tech Topics
Total
1
Toyota Motor Corp.
Aichi, Japan
Sport utility vehicle,Mobile device,Public transport,
...[+2]
Patent: 2,689
2
Mitsubishi Kogyo KK
Japan
Patent: 903
3
Nissan Motor Co., Ltd.
Kanagawa, Japan
Truck,Public transport,Automotive engineering,
...[+2]
Patent: 694
4
Hitachi Ltd.
Tokyo, Japan
Elevator,Electrical equipment,Electric motor,
...[+2]
Patent: 666
5
Isuzu Motors Ltd.
Tokyo, Japan
Truck,Public transport,Diesel engine,
...[+2]
Patent: 599
6
Johnson Matthey Plc
United Kingdom
Diesel particulate filter,Chemical engineering,Cisco Catalyst,
...[+2]
Patent: 573
7
Mazda Motor Corp.
Kanagawa, Japan
Automotive engineering,Reciprocating engine,Manual transmission,
...[+2]
Patent: 490
8
BASF Corp.
New Jersey, United States
Nutrition,Chemical engineering,Aerospace,
...[+2]
Patent: 429
9
Hino Motors, Ltd.
Tokyo, Japan
Truck,Public transport,Gasoline,
...[+2]
Patent: 409
10
Honda Motor Co., Ltd.
Tokyo, Japan
Automotive engineering,Manufacturing engineering,Sport utility vehicle,
...[+2]
Patent: 387
11
Hyundai Motor Co., Ltd.
South Korea
Public transport,Automotive engineering,Truck,
...[+2]
Patent: 327
12
Mitsubishi Motors Corp.
Tokyo, Japan
Sport utility vehicle,Automotive engineering,Electric vehicle,
...[+2]
Patent: 318
13
Ford Motor Co. A/S
Denmark
Patent: 313
14
G.M. Srl
Vicenza, Italy
Chemical engineering
Patent: 305
15
Nihon Denso KK
Saitama, Japan
Manufacturing engineering,Mechanical engineering
Patent: 284
16
Panasonic Holdings Corp.
Osaka, Japan
Semiconductor,Industrial engineering,Electronics,
...[+2]
Patent: 270
17
Matsushita Electronics Corp.
Osaka, Japan
Electronics,Computer hardware,DVD player,
...[+2]
Patent: 270
18
Robert Bosch GmbH
Baden-Württemberg, Germany
Automotive engineering,Mechanical engineering,Electronics,
...[+2]
Patent: 261
19
Robert Bosch Corp.
Michigan, United States
Shopping mall,Truck
Patent: 261
20
General Electric Co.
Massachusetts, United States
Energy management,Turbine,Electronics,
...[+2]
Patent: 240
21
Osaka Gas Co., Ltd.
Osaka, Japan
Natural gas,Activated carbon,Petroleum industry,
...[+2]
Patent: 238
22
Tokyo Gas Co., Ltd.
Tokyo, Japan
Natural gas,Hydrogen chloride,Petroleum industry,
...[+2]
Patent: 206
23
Hitachi Zosen Corp.
Osaka, Japan
Mechanical engineering,Waste-to-energy,Environmental protection,
...[+2]
Patent: 198
24
Mitsubishi Power Ltd.
Kanagawa, Japan
Turbine,Control system,Renewable energy,
...[+2]
Patent: 184
25
TOSHIBA Corp.
Tokyo, Japan
Semiconductor,Computer hardware,Electronics,
...[+2]
Patent: 180
26
Kawasaki Heavy Industries Ltd.
Kyoto, Japan
Turbine,Mechanical engineering,Manufacturing engineering,
...[+2]
Patent: 179
27
BASF SE
Rheinland-Pfalz, Germany
Agriculture,Petrochemical,Chemical engineering,
...[+2]
Patent: 178
28
Toyota Central R&D Labs, Inc.
Aichi, Japan
Semiconductor,Power semiconductor device,System on a chip,
...[+2]
Patent: 174
29
NGK Insulators, Ltd.
Aichi, Japan
Beryllium copper,Industrial engineering,Pottery,
...[+2]
Patent: 171
30
UD Trucks Corp.
Saitama, Japan
Truck,Automotive engineering
Patent: 159
31
Ebara Corp.
Tokyo, Japan
Vacuum pump,Manufacturing engineering,Turbine,
...[+2]
Patent: 155
32
NIPPON STEEL Stainless Steel Corp.
Tokyo, Japan
Mill,Metal,Mining engineering,
...[+1]
Patent: 152
33
Umicore
Brussels Hoofdstedelijk Gewest, Belgium
Zinc,Precious metal,Catalysis,
...[+2]
Patent: 146
34
Mitsubishi Fuso Truck & Bus Corp.
Kanagawa, Japan
Truck,Automotive engineering,Chassis
Patent: 145
35
IHI Power Systems Co., Ltd.
Tokyo, Japan
Turbine,Gas engine,Manufacturing engineering,
...[+2]
Patent: 145
36
Praxair S.T. Technology, Inc.
Connecticut, United States
Information technology consulting,Systems design,Coating,
...[+2]
Patent: 144
37
Volkswagen Group of America, Inc.
Michigan, United States
Truck,Automotive engineering,Automotive industry
Patent: 143
38
Volkswagenwerk AG
Germany
Patent: 143
39
N.E. Chemcat Corp.
Tokyo, Japan
Cisco Catalyst,Chemical engineering,Automotive catalyst,
...[+2]
Patent: 141
40
Exxon Research & Engineering Co.
United States
Patent: 141
41
Scania CV AB
Stockholm, Sweden
Truck,Automotive engineering,Chassis
Patent: 139
42
Peugeot Citroën Automobiles SA
Île-de-France, France
Automotive engineering
Patent: 131
43
DENSO Corp.
Aichi, Japan
Automotive engineering,Industrial robot,Programmable logic controller,
...[+2]
Patent: 125
44
China Petroleum & Chemical Corp.
Beijing Shi, China
Petrochemical,Petroleum,Enterprise software,
...[+2]
Patent: 110
45
Caterpillar, Inc.
Illinois, United States
Turbine,Construction engineering,Mechanical engineering,
...[+2]
Patent: 109
46
Yanmar Co., Ltd.
Osaka, Japan
Diesel engine,Electronics,Tractor,
...[+2]
Patent: 109
47
Mitsubishi Electric Engineering Co., Ltd.
Tokyo, Japan
Patent: 104
48
W.R. Grace & Co.
United States
Coating,Computer hardware,Petrochemical,
...[+2]
Patent: 102
49
Kia Corp.
South Korea
Customer expectation,Automotive engineering,Public transport,
...[+2]
Patent: 98
50
NGK SPARK PLUG CO., LTD.
Aichi, Japan
Spark plug,Automotive engineering,Ceramic art,
...[+2]
Patent: 98
51
Miura Co., Ltd.
Tokyo, Japan
Boiler (power generation),Water-tube boiler,Refrigeration,
...[+2]
Patent: 98
52
John Zink Co. LLC
Oklahoma, United States
Control equipment,Hydronics,Combustion system,
...[+2]
Patent: 94
53
BASF Catalysts LLC
New Jersey, United States
Polyolefin,Mica,Metal,
...[+2]
Patent: 92
54
NKK Corp.
Tokyo, Japan
Natural resource management,Mining engineering
Patent: 91
55
Kobe Steel, Ltd.
Hyogo, Japan
Welding,Electronics,Mining engineering,
...[+2]
Patent: 90
56
thyssenkrupp Industrial Solutions AG
Wisconsin, United States
Industrial engineering,Mechanical engineering,Value added,
...[+2]
Patent: 90
57
Ricoh Co., Ltd.
Tokyo, Japan
Digital media,Data visualization,Thermal paper,
...[+2]
Patent: 85
58
Haldor Topsøe A/S
Hovedstaden, Denmark
Biology,Agriculture,Renewable energy,
...[+2]
Patent: 84
59
Mitsubishi Hitachi Power Systems
Kanagawa, Japan
Control system
Patent: 83
60
International Engine Intellectual Property Co. LLC
Illinois, United States
Intellectual property,Automotive engineering
Patent: 82
61
Siemens AG
Bayern, Germany
Power transmission,Electronics,Turbine,
...[+2]
Patent: 81
62
Siemens SA
Madrid, Spain
Scientific Control,Telecommunications,Turbine,
...[+1]
Patent: 81
63
Air Products & Chemicals, Inc.
Pennsylvania, United States
Industrial gas,Chemical engineering,Helium,
...[+2]
Patent: 80
64
Nippon Shokubai Co., Ltd.
Tokyo, Japan
Polymer,Acrylic acid,Chemical engineering,
...[+2]
Patent: 80
65
Petroleum Energy Center
Tokyo, Japan
Hydrogen,Petroleum industry
Patent: 80
66
The Babcock & Wilcox Co.
Ohio, United States
Electronics,Flue-gas desulfurization,Control equipment,
...[+2]
Patent: 78
67
IHI Corp.
Tokyo, Japan
Turbocharger,Manufacturing engineering,Turbine,
...[+2]
Patent: 77
68
Exxon Mobil Corp.
Texas, United States
Petroleum,Petroleum industry,Chemical engineering,
...[+2]
Patent: 76
69
Mobil Corp.
Texas, United States
Petroleum industry,Petroleum,Natural gas
Patent: 76
70
Xi'an Thermal Power Research Institute Co., Ltd.
Shaanxi Sheng, China
Patent: 70
71
Rhodia Operations SASU
Île-de-France, France
Chemical engineering
Patent: 70
72
Sakai Chemical Industry Co., Ltd.
Osaka, Japan
Chemical engineering,Zinc,Titanium dioxide,
...[+2]
Patent: 69
73
Weichai Power Co., Ltd.
Shandong Sheng, China
Diesel engine,Spark plug,Gasoline,
...[+2]
Patent: 68
74
Noritsu Koki Co., Ltd.
Chiba, Japan
Hydroponics,Drug discovery,Ultracentrifuge,
...[+2]
Patent: 68
75
Mercedes-Benz Group AG
Baden-Württemberg, Germany
Automotive engineering,Electric vehicle,Hybrid vehicle,
...[+2]
Patent: 67
76
Mitsui E&S Holdings Co., Ltd.
Tokyo, Japan
Public transport,Hydrogen compressor,Reciprocating compressor,
...[+2]
Patent: 66
77
Daimier AG
Germany
Truck,Chassis
Patent: 66
78
Renault SA
Île-de-France, France
Sport utility vehicle,Automotive engineering,Venture capital,
...[+2]
Patent: 65
79
Kubota Corp.
Osaka, Japan
Tractor,Manufacturing engineering,Combine harvester,
...[+2]
Patent: 65
80
Renault SAS
Île-de-France, France
Automotive engineering,Guanosine diphosphate
Patent: 65
81
Corning, Inc.
New York, United States
Telecommunications,Computer hardware,Electronics,
...[+2]
Patent: 64
82
Cataler Corp.
Shizuoka, Japan
Cisco Catalyst,Automotive engineering
Patent: 64
83
Komatsu Ltd.
Tokyo, Japan
Environmental engineering,Construction engineering,Heavy equipment,
...[+2]
Patent: 63
84
YanTai LongYuan Power Technology Co., Ltd.
Shandong Sheng, China
Heat exchanger,Electronics,NOx,
...[+2]
Patent: 61
85
Uhde
Germany
Chemical engineering
Patent: 61
86
TAKUMA CO., LTD.
Hyogo, Japan
Manufacturing engineering,Agricultural waste,Boiler (power generation),
...[+2]
Patent: 60
87
SANYO Electric Co., Ltd.
Osaka, Japan
Semiconductor,Computer hardware,Software,
...[+2]
Patent: 60
88
Fuel Tech, Inc.
Illinois, United States
Air pollution,Chemical energy,Petroleum industry,
...[+2]
Patent: 60
89
Fuel-Tech NV
Netherlands
Construction engineering,Process optimization,Air pollution,
...[+2]
Patent: 60
90
POSCO
South Korea
Materials science,Mining engineering,Metal,
...[+2]
Patent: 59
91
Huaneng Clean Energy Research Institute
Beijing Shi, China
Petroleum coke
Patent: 59
92
Sumitomo Metal Mining Co., Ltd.
Tokyo, Japan
Nickel,Mining engineering,Natural resource management,
...[+2]
Patent: 57
93
Nippon Furnace Co. Ltd.
Kanagawa, Japan
Automation,Manufacturing engineering,Industrial engineering,
...[+2]
Patent: 57
94
Cummins, Inc.
Indiana, United States
Electric vehicle,Natural gas,Petroleum industry,
...[+2]
Patent: 56
95
Daihatsu Motor Co., Ltd.
Osaka, Japan
Automotive engineering,Proton exchange membrane fuel cell,Electric bus,
...[+2]
Patent: 56
96
Toyota Industries Corp.
Aichi, Japan
Textile,Software,Automotive engineering,
...[+2]
Patent: 55
97
Tosoh Corp.
Tokyo, Japan
Petrochemical,Chemical engineering,Immunoprotein,
...[+2]
Patent: 50
98
Sumitomo Heavy Industries, Ltd.
Tokyo, Japan
Sewage treatment,Proton therapy,Cryocooler,
...[+2]
Patent: 49
99
Kawasaki Steel Corp.
Japan
Patent: 49
100
Kawasaki Steel
Patent: 49

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