US D597,637 S
Pipe extension
Steven Krohmer, Coon Rapids, Minn. (US); and Daniel P. Banasik, Eagan, Minn. (US)
Assigned to Rockler Companies, Inc., Medina, Minn. (US)
Filed on Nov. 25, 2008, as Appl. No. 29/328,469.
Term of patent 14 Years
LOC (9) Cl. 23 - 01
U.S. Cl. D23—266
OG exemplary drawing
 
The ornamental design for a pipe extension, as shown and described.