Retrofit zone damper
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Claims
The ornamental design for a retrofit zone damper, as shown and described.
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Type: Grant
Filed: Feb 29, 2012
Date of Patent: Aug 11, 2015
Assignee: Alan Manufacturing Inc. (Wooster, OH)
Inventor: Richard Bluestone (Mayfield Heights, OH)
Primary Examiner: Sandra Snapp
Application Number: 29/414,527