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Qingyan Ji — 1 Patent

UNUnknown: 1 patents #29,356 of 83,584Top 40%

Beidaihe District, CN: #1 of 3 inventorsTop 35%

Overall (All Time): #2,406,284 of 4,157,543Top 60%

1 Patents All Time

Qingyan Ji has been granted 1 US patent while listed as an inventor at Unknown. All of these patents were granted in 1992. Qingyan Ji ranks #2,406,284 of 4,157,543 US inventors in our database (top 57.9%). Patent records list Qingyan Ji in Beidaihe District, CN.

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
5112463	Apparatus for water electrolysis	Xueming Zhang, Shucheng Zhang, Shuxia ZHANG, Congshan Liu, Haibuo Zhang +3 more	1992-05-12

Qingyan Ji — 1 Patent

Issued Patents All Time

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