Knife sharpener
Description
The broken lines in the figures illustrate portions of the knife sharpener that form no part of the claimed design.
Claims
The ornamental design for a knife sharpener, as shown and described.
Referenced Cited
U.S. Patent Documents
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Patent History
Patent number: D898538
Type: Grant
Filed: Feb 28, 2020
Date of Patent: Oct 13, 2020
Inventor: Huazhu Liu (Shandong Province)
Primary Examiner: Philip S Hyder
Application Number: 29/725,942
Type: Grant
Filed: Feb 28, 2020
Date of Patent: Oct 13, 2020
Inventor: Huazhu Liu (Shandong Province)
Primary Examiner: Philip S Hyder
Application Number: 29/725,942
Classifications
Current U.S. Class:
D8/93