---

Register or Login To Download This Patent As A PDF

United States Patent	D590,548
Johnson ,   et al.	April 14, 2009

---

---

---

CLAIM The ornamental design for a breathing tube connection for respiratory protection system, as shown and described.

---

Inventors:	Johnson; Benjamin A. (Woodbury, MN), Kilmer; Sean R. (Lino Lakes, MN), Nelson; Bruce E. (Oakdale, MN), Stavos; Steven W. (Blaine, MN), Ulwelling; James M. (Eau Claire, WI)
Assignee:	3M Innovative Properties Company (St. Paul, MN)
Appl. No.:	D/306,139
Filed:	April 3, 2008

---

Current U.S. Class:	D29/122
Current International Class:	2902
Field of Search:	D29/108,110,111,122 2/7,8.1-8.8,9-11,15,6.3,6.5,6.7,424,427,429,5 128/857,858,206.28,207.11,207.17,201.23,201.24,201.25,206.21,206.23,206.24 D24/191

---

References Cited

---

U.S. Patent Documents

D250496	December 1978	Odell et al.
4995117	February 1991	Mirage
D420771	February 2000	Burns
6035451	March 2000	Burns et al.
6102033	August 2000	Baribeau et al.
6298498	October 2001	Burns et al.
6332228	December 2001	Takahara
D499214	November 2004	Cheng
D503497	March 2005	Canavan et al.
D503498	March 2005	Canavan et al.
D504195	April 2005	Canavan et al.
D511227	November 2005	Canavan et al.
D511865	November 2005	Canavan et al.
D512187	November 2005	Canavan et al.
D517745	March 2006	Lee et al.
7007306	March 2006	Howard et al.
D539485	March 2007	Huh

Primary Examiner: McInroy; Ruth
Attorney, Agent or Firm: Wetzels; Anna A.

---

Description

---

FIG. 1 is a perspective view of a breathing tube connection for respiratory protection system showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof, the right side view being a mirror image thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines form no part of the claimed design.

* * * * *