Top 100 Key Players companies in Greenhouse effect by Most Patent Citation in the world in 2021 – Discovery

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The Greenhouse effect top 100 is Discovery PatSnap’ annual ranking of the top 100 Most Patent Citation Greenhouse effect Key Players in the world. Discovery has identified the top key players, startups & unicorns, fast-growings, news entrants in 2021, ranking from differnt perspectives, including patent filing intensity, academic research capability, news media heat. The company list is generated from various data types.

The greenhouse effect is the process by which radiation from a planet's atmosphere warms the planet's surface to a temperature above what it would be without this atmosphere. Radiatively active gases (i.e., greenhouse gases) in a planet's atmosphere radiate energy in all directions. Part of this radiation is directed towards the surface, warming it. The intensity of the downward radiation – that is, the strength of the greenhouse effect – will depend on the atmosphere's temperature and on the amount of greenhouse gases that the atmosphere contains.

1	Showa Denko K.K.	Chiba, Japan	Graphite,Materials science,Nanomaterials, ...[+2]	patent citation: 252
2	Horiba Ltd.	Kyoto, Japan	Semiconductor,Electronics,Hematology, ...[+2]	patent citation: 97
3	TOSHIBA Corp.	Tokyo, Japan	Semiconductor,Computer hardware,Electronics, ...[+2]	patent citation: 78
4	Saipem SpA	Lombardia, Italy	Offshore drilling,Petroleum industry,Construction engineering, ...[+2]	patent citation: 74
5	Siemens AG	Bayern, Germany	Power transmission,Electronics,Turbine, ...[+2]	patent citation: 70
6	Siemens SA	Madrid, Spain	Scientific Control,Telecommunications,Turbine, ...[+1]	patent citation: 70
7	NEC Corp.	Tokyo, Japan	Virtualization,Big data,Network security, ...[+2]	patent citation: 63
8	Fiat SpA	TURIN, Italy	Automotive engineering,Chassis,Spare part, ...[+2]	patent citation: 61
9	Overhead Door Corp.	Texas, United States	Shutter,Storm door,Millwork, ...[+2]	patent citation: 60
10	Hitachi Ltd.	Tokyo, Japan	Elevator,Electrical equipment,Electric motor, ...[+2]	patent citation: 48
11	CO2 Solutions, Inc.	Quebec, Canada	Carbon,Refrigeration,Enzyme, ...[+2]	patent citation: 48
12	Centos, Inc.	Taiwan Province, China	Computer hardware,Electronics	patent citation: 47
13	Cythelia Energy SAS	Rhône-Alpes, France	Renewable energy,Energy management,Environmental consulting	patent citation: 46
14	Mitsubishi Electric Engineering Co., Ltd.	Tokyo, Japan		patent citation: 40
15	Mitsubishi Kogyo KK	Japan		patent citation: 39
16	Tokyo Gas Co., Ltd.	Tokyo, Japan	Natural gas,Hydrogen chloride,Petroleum industry, ...[+2]	patent citation: 38
17	Tokyo Electron Ltd.	Tokyo, Japan	Semiconductor,Power transmission,Flat panel display, ...[+2]	patent citation: 33
18	Raytheon Co.	Massachusetts, United States	Missile,National security,Aerospace, ...[+2]	patent citation: 32
19	AT&T, Inc.	Texas, United States	Wireless,Telecommunications,Mobile device, ...[+2]	patent citation: 28
20	AT&T IPM Corp.	United States		patent citation: 28
21	Canon, Inc.	Tokyo, Japan	Computer hardware,Software,Computer vision, ...[+2]	patent citation: 27
22	AGC	Tokyo, Japan	Fluorine,Glazing,Chemical engineering, ...[+2]	patent citation: 27
23	Asahi Fiber Glass Co., Ltd.	Tokyo, Japan	Glass wool,Thermal insulation,Fiber, ...[+2]	patent citation: 27
24	Houpu Clean Energy Group Co., Ltd.	Sichuan Sheng, China	Fuel dispenser,Petroleum industry,Natural gas, ...[+2]	patent citation: 24
25	Sinochem Lantian Co., Ltd.	Zhejiang Sheng, China	Petrochemical,Fluorite,Chemical engineering, ...[+1]	patent citation: 24
26	Zhejiang Lantian Environmental Protection HI Tech Co. Ltd.	China	Refrigerant,Fluorine,Chemical engineering, ...[+2]	patent citation: 24
27	Integrated Packaging Australia Pty Ltd.	Australia		patent citation: 24
28	Western Marine Electronics Co.	Washington, United States	Electronics,Sonar,National security, ...[+1]	patent citation: 21
29	Sumitomo Mitsui Construction Co., Ltd.	Tokyo, Japan	Civil engineering,Construction engineering,Facility management	patent citation: 20
30	Zhuhai Yinlong Energy Co. Ltd.	China		patent citation: 19
31	TCL Air Conditioner (Zhongshan) Co., Ltd.	China	Conditioners,Chiller,Automation, ...[+2]	patent citation: 16
32	JG Environmental Technology Co., Ltd.	Taiwan Province, China	Automation,Manufacturing engineering,Industrial engineering, ...[+2]	patent citation: 15
33	Pliant LLC	Indiana, United States	Plastic bag,Microservices,Packaging engineering	patent citation: 14
34	Sony Group Corp.	Tokyo, Japan	Computer hardware,Software,Music, ...[+2]	patent citation: 13
35	Kinder Morgan, Inc.	Texas, United States	Petroleum industry,Natural gas,Petroleum product, ...[+2]	patent citation: 13
36	Wing Ship Technology Corp.	DE, KR	Mechanical engineering,Manufacturing engineering	patent citation: 13
37	SK Industrial Co., Ltd.	South Korea		patent citation: 13
38	Dowa Electronics Materials Co., Ltd.	Tokyo, Japan	Electronics,Semiconductor,Mining engineering, ...[+2]	patent citation: 12
39	Société Rennaise d'Electronique et Composants SA	France	Electronic product,Power transmission,Electronics	patent citation: 12
40	Gree Electric Appliances, Inc. of Zhuhai	Guangdong Sheng, China	Electronics,Conditioners,Air conditioning, ...[+2]	patent citation: 11
41	China Petroleum & Chemical Corp.	Beijing Shi, China	Petrochemical,Petroleum,Enterprise software, ...[+2]	patent citation: 11
42	Kumagai Gumi Co., Ltd.	Yamanashi, Japan	Civil engineering,Construction engineering,Flood control, ...[+1]	patent citation: 11
43	China National Offshore Oil Corp.	Beijing Shi, China	Natural gas,China sea,Petroleum industry, ...[+2]	patent citation: 11
44	Mitsubishi Heavy Industries Engine & Turbocharger Ltd.	Kanagawa, Japan	Turbocharger,Gasoline,Automotive engineering, ...[+2]	patent citation: 11
45	Cnooc Research Institute Co. Ltd.	Beijing Shi, China		patent citation: 11
46	Toppan, Inc.	Tokyo, Japan	Publishing,Semiconductor,Electronics, ...[+2]	patent citation: 10
47	Bajer Design & Marketing, Inc.	Wisconsin, United States	Information technology consulting,Systems design	patent citation: 10
48	Osaka Gas Co., Ltd.	Osaka, Japan	Natural gas,Activated carbon,Petroleum industry, ...[+2]	patent citation: 9
49	Fuji Electronics Co., Ltd.	Tokyo, Japan	Semiconductor,Microcomputer,Electronic component, ...[+2]	patent citation: 9
50	Xinjiang Tianye (Group) Ltd.	Xinjiang Uygur, China	Synthetic rubber,Chemical engineering,Chlorine, ...[+2]	patent citation: 9
51	Beijing Gas Group Co., Ltd.	Beijing Shi, China	Technology transfer,Petroleum industry,Natural gas	patent citation: 9
52	Fuji Electric FA Components & SYstems Co., Ltd.	Tokyo, Japan	Semiconductor,Industrial engineering,Smart grid, ...[+2]	patent citation: 9
53	The Agricultural Gas Co.	California, United States	Agriculture,Renewable energy,Farming industry, ...[+2]	patent citation: 9
54	Shijiazhuang Xinhua Energy Environmental Technology Co., Ltd.	Hebei Sheng, China		patent citation: 9
55	Sumitomo Forestry Co., Ltd.	Tokyo, Japan	Forestry,Forest product,Reforestation, ...[+2]	patent citation: 8
56	Toshiba Energy Systems & Solutions Corp.	Fukushima, Japan	Power transmission,Electricity,Proton exchange membrane fuel cell, ...[+2]	patent citation: 8
57	Dairei Co., Ltd.	Tokyo, Japan	Food industry,Health care,Food processing, ...[+2]	patent citation: 7
58	Knight LLC	California, United States	Automation,Mechanical engineering,Manufacturing engineering, ...[+1]	patent citation: 7
59	Nihon Freezer Co. Ltd.	Japan		patent citation: 7
60	Rem Technology, Inc.	Canada		patent citation: 7
61	Hebei Electric Power Equipment Co., Ltd.	Hebei Sheng, China	Electrical equipment,Electronics,Switchgear	patent citation: 7
62	Sharp Corp.	Osaka, Japan	Computer hardware,Electronics,Telecommunications, ...[+2]	patent citation: 6
63	China XD Electric Co., Ltd.	Shaanxi Sheng, China	Power transmission,Electrical equipment,Transformer, ...[+2]	patent citation: 6
64	Japan Energy Corp.	Tokyo, Japan	Petroleum,Petroleum industry,Liquefied petroleum gas, ...[+2]	patent citation: 6
65	Wuhan Rixin Technology Co., Ltd.	Hubei Sheng, China	Amorphous silicon,Electronics,Curtain wall, ...[+2]	patent citation: 6
66	ARI Industries, Inc.	California, United States	Fuel pump,Fuel injection,Automation, ...[+2]	patent citation: 6
67	Yantai Shunda Polyurethane Co. Ltd.	China		patent citation: 6
68	Cameron Japan Co., Ltd.	Tokyo, Japan	Petroleum industry,Natural resource management	patent citation: 6
69	Tokyo Gas Chemicals Co. Ltd.	Japan	Industrial gas,Chemical engineering	patent citation: 6
70	Kobe Steel, Ltd.	Hyogo, Japan	Welding,Electronics,Mining engineering, ...[+2]	patent citation: 5
71	The Chugoku Electric Power Co., Inc.	Hiroshima, Japan	Renewable energy,Petroleum industry,Electric power transmission, ...[+2]	patent citation: 5
72	Nitto Boseki Co., Ltd.	Tokyo, Japan	Glass fiber,Textile,Composite material, ...[+2]	patent citation: 5
73	Maeda Corp.	Tokyo, Japan	Civil engineering,Construction engineering,Renewable energy, ...[+2]	patent citation: 5
74	Meiji Seika Kaisha Ltd.	Tokyo, Japan	Veterinary medicine,Food industry,Snack foods, ...[+1]	patent citation: 5
75	Meiji Seika Pharma Co., Ltd.	Tokyo, Japan	Clinical trial,Drug,Medicine, ...[+2]	patent citation: 5
76	Matsushita Seiko Co Ltd	Osaka, Japan	Automation,Manufacturing engineering,Industrial engineering, ...[+2]	patent citation: 5
77	Zhejiang Chem-Tech Group Co. Ltd.	Zhejiang Sheng, China	Automation,Mechanical engineering,Manufacturing engineering, ...[+1]	patent citation: 5
78	Guodian Science & Technology Research Institute Co., Ltd.	Jiangsu Sheng, China	Research development	patent citation: 5
79	Mitaka Kohki Co. Ltd.	Japan	Medical equipment,Telescope,Optical microscope, ...[+2]	patent citation: 5
80	Jiangsu Sanjili Chemical Co., Ltd.	China		patent citation: 5
81	Ricoh Co., Ltd.	Tokyo, Japan	Digital media,Data visualization,Thermal paper, ...[+2]	patent citation: 4
82	Dai Nippon Printing Co., Ltd.	Tokyo, Japan	Electronics,Publishing,Publication, ...[+2]	patent citation: 4
83	Kajima Corp.	Tokyo, Japan	Civil engineering,Construction engineering,Real estate development, ...[+2]	patent citation: 4
84	State Grid Corp. of China	Beijing Shi, China	Electric vehicle,Power grid,Total asset, ...[+2]	patent citation: 4
85	METAWATER Co., Ltd.	Tokyo, Japan	Cloud database,Construction engineering,Waste management, ...[+2]	patent citation: 4
86	MARKTEC Corp.	Tokyo, Japan	Cosmetics,Automation,Industrial engineering, ...[+2]	patent citation: 4
87	Pinggao Group Co., Ltd.	Henan Sheng, China	Semiconductor,Ultra high voltage,Electronics, ...[+2]	patent citation: 4
88	Laboratorio Pablo Cassara Srl	AR	Medicine	patent citation: 4
89	Dainippon Printing Co. Ltd.	Japan		patent citation: 4
90	Meiyi (Zhejiang) Air Conditioning Equipment Co. Ltd.	China		patent citation: 4
91	Zhejiang Yasha Curtain Wall Co., Ltd.	Zhejiang Sheng, China		patent citation: 4
92	Takenaka Corp.	Osaka, Japan	Construction engineering,Site location,Masonry, ...[+2]	patent citation: 3
93	Tokio Marine & Nichido Fire Insurance Co., Ltd.	Tokyo, Japan	General insurance,Liability insurance,Earthquake insurance, ...[+2]	patent citation: 3
94	Hitachi High-Tech Corp.	Illinois, United States	Semiconductor,Electronics,Microscope, ...[+2]	patent citation: 3
95	Bertin Ltda.	São Paulo, Brazil	Food industry,Renewable energy,Personal protective equipment, ...[+2]	patent citation: 3
96	Energy Technologies, Inc.	Massachusetts, United States	Electronics,Telecommunications	patent citation: 3
97	Jupiter Oxygen Corp.	Illinois, United States	Jupiter,Oxygen,Carbon dioxide	patent citation: 3
98	Valeo Thermal Systems Japan Corp.	Tokyo, Japan	Thermal,Automation,Manufacturing engineering, ...[+2]	patent citation: 3
99	Yanmar Agricultural Equipment Co. Ltd.	Osaka, Japan	Tractor	patent citation: 3
100	Dongguan Zelong Wire & Cable Co. Ltd.	China		patent citation: 3