Calibration unit
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Description
Claims
The ornamental design for a calibration unit, as shown and described.
Referenced Cited
U.S. Patent Documents
20120071917 | March 22, 2012 | McDonald et al. |
Patent History
Patent number: D685097
Type: Grant
Filed: Dec 1, 2010
Date of Patent: Jun 25, 2013
Assignee: SECTRA Aktiebolag (Linköping)
Inventor: Hansjorg Kirchner (Markgröningen)
Primary Examiner: T. Chase Nelson
Assistant Examiner: Ania Aman
Application Number: 29/380,191
Type: Grant
Filed: Dec 1, 2010
Date of Patent: Jun 25, 2013
Assignee: SECTRA Aktiebolag (Linköping)
Inventor: Hansjorg Kirchner (Markgröningen)
Primary Examiner: T. Chase Nelson
Assistant Examiner: Ania Aman
Application Number: 29/380,191
Classifications
Current U.S. Class:
Orthopedic Or Chiropractic (43) (D24/171)