Filter
Description
The broken lines depict portions of the filter which form no part of the claimed design.
Claims
The ornamental design for a filter, as shown and described.
Referenced Cited
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Patent History
Patent number: D938567
Type: Grant
Filed: Jan 22, 2020
Date of Patent: Dec 14, 2021
Inventor: Zhigang Du (Tianjin)
Primary Examiner: John A Voytek
Application Number: 29/721,700
Type: Grant
Filed: Jan 22, 2020
Date of Patent: Dec 14, 2021
Inventor: Zhigang Du (Tianjin)
Primary Examiner: John A Voytek
Application Number: 29/721,700
Classifications
Current U.S. Class:
Filter (D23/365)