Clamshell-style valve knob cover lockout device
The broken line showings of a sample valve and pipe extending therefrom are directed to environment and are for illustrative purposes only; the broken lines form no part of the claimed design.
Claims
I claim the ornamental design for a clamshell-style valve knob cover lockout device, as shown and described.
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Type: Grant
Filed: Apr 26, 2013
Date of Patent: Jan 6, 2015
Inventor: Patrick M. O'Banion (Hillsboro, OR)
Primary Examiner: Cynthia Ramirez
Assistant Examiner: Gino Colan
Application Number: 29/453,300