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The ornamental design for a respiratory protection mask, as shown and described. |
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FIG. 1 is a perspective view of a respiratory protection mask showing the new design.
FIG. 2 is a front elevational view thereof.
FIG. 3 is a rear elevational view thereof.
FIG. 4 is a top elevational view thereof.
FIG. 5 is a bottom elevational view thereof; and,
FIG. 6 is a right elevational view thereof. The left side is a mirror image of the right side.
Curran, Desmond T., Henderson, Christopher P., Dyrud, James F., Bryant, John W.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Nov 07 1997 | 3M Innovative Properties Company | (assignment on the face of the patent) | / | |||
| Nov 10 1999 | Minnesota Mining and Manufacturing Company | 3M Innovative Properties Company | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 010417 | /0035 |
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