Filter
Description
The broken line shown represent portions of a filter and forms no part of the claimed design.
Claims
The ornamental design for filter, as shown and described.
Referenced Cited
U.S. Patent Documents
Other references
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Patent History
Patent number: D932589
Type: Grant
Filed: Mar 30, 2020
Date of Patent: Oct 5, 2021
Inventor: Zhigang Du (Tianjin)
Primary Examiner: Jack Reickel
Assistant Examiner: Keith J Wilson
Application Number: 29/729,776
Type: Grant
Filed: Mar 30, 2020
Date of Patent: Oct 5, 2021
Inventor: Zhigang Du (Tianjin)
Primary Examiner: Jack Reickel
Assistant Examiner: Keith J Wilson
Application Number: 29/729,776
Classifications
Current U.S. Class:
Filter Or Strainer (2) (D23/209)