US D590,548 S
Breathing tube connection for respiratory protection system
Benjamin A. Johnson, Woodbury, Minn. (US); Sean R. Kilmer, Lino Lakes, Minn. (US); Bruce E. Nelson, Oakdale, Minn. (US); Steven W. Stavos, Blaine, Minn. (US); and James M. Ulwelling, Eau Claire, Wis. (US)
Assigned to 3M Innovative Properties Company, St. Paul, Minn. (US)
Filed on Apr. 03, 2008, as Appl. No. 29/306,139.
Term of patent 14 Years
LOC (9) Cl. 29 - 02
U.S. Cl. D29—122
OG exemplary drawing
 
The ornamental design for a breathing tube connection for respiratory protection system, as shown and described.