Stackable extension
Description
The broken lines shown herein are for illustrative purposes only and form no part of the claimed design.
Claims
The ornamental design for a stackable extension, as shown and described.
Referenced Cited
U.S. Patent Documents
Patent History
Patent number: D638587
Type: Grant
Filed: Oct 28, 2010
Date of Patent: May 24, 2011
Inventor: Richard C. Petek (Medina, OH)
Primary Examiner: Susan Bennett Hattan
Assistant Examiner: Barbara B Lohr
Attorney: Renner, Otto, Boisselle & Sklar, LLP
Application Number: 29/377,982
Type: Grant
Filed: Oct 28, 2010
Date of Patent: May 24, 2011
Inventor: Richard C. Petek (Medina, OH)
Primary Examiner: Susan Bennett Hattan
Assistant Examiner: Barbara B Lohr
Attorney: Renner, Otto, Boisselle & Sklar, LLP
Application Number: 29/377,982
Classifications
Current U.S. Class:
Rescue (D29/124)