USD907755SActiveUtility

Filter for air purification

88
Assignee: DARTECH CO LTDPriority: Oct 11, 2018Filed: Apr 9, 2019Granted: Jan 12, 2021
Est. expiryOct 11, 2038(~12.2 yrs left)· nominal 20-yr term from priority
Inventors:Kwi-Seok Choi
F04D 25/08
88
PatentIndex Score
6
Cited by
25
References
1
Claims

Claims

exact text as granted — not AI-modified
CLAIM 
     
       The ornamental design for a filter for air purification, as shown and described.

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