USD309414SExpiredUtility

Knife sharpener

Assignee: SHIMIZU KIYOSHIPriority: Oct 29, 1987Filed: Apr 11, 1988Granted: Jul 24, 1990
Est. expiryOct 29, 2007(expired)· nominal 20-yr term from priority
Inventors:Kiyoshi Shimizu
87
PatentIndex Score
26
Cited by
2
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a knife sharpener, as shown and described.

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