USD641572SActiveUtility
Chair back frame
Est. expiryFeb 1, 2030(~3.5 yrs left)· nominal 20-yr term from priority
Inventors:Hsuan-Chin Tsai
87
PatentIndex Score
39
Cited by
18
References
1
Claims
Claims
exact text as granted — not AI-modifiedThe ornamental design for a chair back frame, as shown and described.
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