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Top 20 Key Players companies in Am star
by Most Patent Citation in the Japan in 2020

The Am star top 20 is Discovery PatSnap’ annual ranking of the top 20 Most Patent Citation Am star Key Players in the Japan. Discovery has identified the top key players, startups & unicorns, fast-growings, news entrants in 2020, 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: 10
2
patent citation: 10
3
Microscope,Photography,Motion capture,
...[+2]
patent citation: 9
4
patent citation: 9
5
patent citation: 8
6
patent citation: 8
7
patent citation: 8
8
patent citation: 6
9
patent citation: 6
10
patent citation: 5
11
Fiber,Textile,Textile (markup language),
...[+2]
patent citation: 4
12
patent citation: 3
13
patent citation: 3
14
patent citation: 1
15
patent citation: 1
16
patent citation: 0
17
patent citation: 0
18
Digital media,Data visualization,Thermal paper,
...[+2]
patent citation: 0
19
Electronics,Publishing,Publication,
...[+2]
patent citation: 0
20
Civil engineering,Construction engineering,Real estate development,
...[+2]
patent citation: 0
Page generation time: Jul 20 2025