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Ching-ray Chang

USPTO Granted Patents = 1

Forward Citations = 2

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5 inventors (with patents filed for the assignee):

Jen-Hwa Hsu (1 out of 6 patents)

Ching-Ray Chang (1 out of 8 patents)

An-Cheng Sun (1 out of 4 patents)

4. Po-Cheng Kuo (1 out of 6 patents)

5. Huei-Li Huang (1 out of 1 patent)

1 patent: Sort by Forward Citations

1. 7993766 - Perpendicular magnetic recording medium and method for fabricating the same (2011-08-09),

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USPTO Data Jan 1 1976 - Dec 23 2025

1 Patents

#2,034 in Taipei

#5,929 in Taiwan

Ching-ray Chang

Forward Citations = 2

5 inventors:

Jen-Hwa Hsu (1 out of 6 patents)

Ching-Ray Chang (1 out of 8 patents)

An-Cheng Sun (1 out of 4 patents)

4. Po-Cheng Kuo (1 out of 6 patents)

5. Huei-Li Huang (1 out of 1 patent)

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