Negative pressure device
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The broken lines depict portions of a negative pressure device that form no part of the claim.
The dash-dot-dot broken line showing of a tube in
Shading is used to illustrate the curvature of the part and not color.
Claims
The ornamental design for a negative pressure device, as shown and described.
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Type: Grant
Filed: Jun 12, 2017
Date of Patent: Mar 5, 2019
Assignee: BenQ Materials Corporation (Taoyuan)
Inventor: Mao-Sung Huang (Taoyuan)
Primary Examiner: George D. Kirschbaum
Assistant Examiner: Darcey E Heflin
Application Number: 29/607,191