USD453290SExpiredUtility

Knife sharpening tool

73
Priority: Mar 16, 2001Filed: Mar 16, 2001Granted: Feb 5, 2002
Est. expiryMar 16, 2021(expired)· nominal 20-yr term from priority
Inventors:Yin-Hu Huang
73
PatentIndex Score
25
Cited by
10
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a knife sharpening tool, as shown.

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