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Top 50 Key Players companies in Am star
by Most Patent Citation in the world in 2019

The Am star top 50 is Discovery PatSnap’ annual ranking of the top 50 Most Patent Citation Am star 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.
An Am star or metallic-line star is a type of chemically peculiar star of spectral type A whose spectrum has strong and often variable absorption lines of metals such as zinc, strontium, zirconium, and barium, and deficiencies of others, such as calcium and scandium. The original definition of an Am star was one in which the star shows "an apparent surface underabundance of Ca (and/or Sc) and/or an apparent overabundance of the Fe group and heavier elements".
#
Company Name
Region
Tech Topics
Total
1
patent citation: 50
2
patent citation: 50
3
BV, DE
patent citation: 19
4
patent citation: 18
5
AT
patent citation: 12
6
Zug, Switzerland
patent citation: 11
7
patent citation: 10
8
patent citation: 10
9
Microscope,Photography,Motion capture,
...[+2]
patent citation: 9
10
patent citation: 9
11
DE
patent citation: 9
12
patent citation: 8
13
patent citation: 8
14
patent citation: 8
15
Airport security,Supply chain management,Vehicle inspection,
...[+2]
patent citation: 7
16
patent citation: 6
17
patent citation: 6
18
patent citation: 6
19
patent citation: 6
20
patent citation: 5
21
Leisure satisfaction
patent citation: 5
22
patent citation: 5
23
GB
patent citation: 5
24
patent citation: 4
25
Fiber,Textile,Textile (markup language),
...[+2]
patent citation: 4
26
patent citation: 4
27
LD, GB
patent citation: 4
28
patent citation: 3
29
patent citation: 3
30
patent citation: 3
31
Madrid, Spain
patent citation: 3
32
patent citation: 2
33
IA, US
patent citation: 2
34
patent citation: 1
35
Île-de-France, France
patent citation: 1
36
patent citation: 1
37
Dorset, United Kingdom
patent citation: 1
38
patent citation: 1
39
DE
patent citation: 1
40
patent citation: 1
41
ZURICH, Switzerland
patent citation: 0
42
patent citation: 0
43
patent citation: 0
44
patent citation: 0
45
Toothpaste,Dental floss,Fast-moving consumer goods,
...[+2]
patent citation: 0
46
Digital media,Data visualization,Thermal paper,
...[+2]
patent citation: 0
47
South Korea
patent citation: 0
48
Electronics,Publishing,Publication,
...[+2]
patent citation: 0
49
Civil engineering,Construction engineering,Real estate development,
...[+2]
patent citation: 0
50
patent citation: 0
Page generation time: Jul 20 2025