Constant temperature circulator
The broken lines shown in the drawing are for the purpose of illustrating portions of the article and form no part of the claimed design.
Claims
The ornamental design for a constant temperature circulator, as shown and described herein.
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Type: Grant
Filed: Feb 1, 2012
Date of Patent: Nov 12, 2013
Assignee: Preston Industries, Inc. (Niles, IL)
Inventor: Philip Preston (Northfield, IL)
Primary Examiner: T. Chase Nelson
Assistant Examiner: Ania Aman
Application Number: 29/412,299