Creasing rule for paperboard blanks
Claims
The ornamental design for a creasing rule for paperboard blanks, as shown and described.
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Type: Grant
Filed: Jun 22, 2018
Date of Patent: Aug 3, 2021
Assignee: The C.W. Zumbiel Company (Hebron, KY)
Inventors: Steven J. Block (Amelia, OH), Edward A. Zumbiel (Union, KY)
Primary Examiner: Khawaja Anwar
Application Number: 29/654,278