Filter key device
Latest NINGBO YINZHOU BI CHUN WATER PURIFICATION TECHNOLOGY LIMITED COMPANY Patents:
The broken line showing of various features of the filter key device form no part of the claimed design.
Claims
The ornamental design of a filter key device, as shown and described.
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Type: Grant
Filed: Nov 1, 2018
Date of Patent: Aug 6, 2019
Assignee: NINGBO YINZHOU BI CHUN WATER PURIFICATION TECHNOLOGY LIMITED COMPANY
Inventor: Matthew Stein (Truckee, CA)
Primary Examiner: Khawaja Anwar
Application Number: 29/668,765