Vent valve of a wastewater drainage pipe
The evenly spaced broken lines depict portions of the vent valve of a wastewater drainage pipe that form no part of the claimed design. The dash-dot-dash broken lines shown in
Claims
The ornamental design for a vent valve of a wastewater drainage pipe, as shown and described.
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Type: Grant
Filed: Jun 24, 2021
Date of Patent: Dec 19, 2023
Inventor: Jong Won Kim (Gimpo-si)
Primary Examiner: Karen S Acker
Assistant Examiner: Andrea Marie McKay
Application Number: 29/796,436