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The ornamental design for a respiratory mask, as shown and described. |
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FIG. 1 is a perspective view showing the new design for a respiratory mask design.
FIG. 2 is a front view thereof.
FIG. 3 is a top elevational view thereof.
FIG. 4 is a bottom elevational view thereof.
FIG. 5 is a rear elevational view; and,
FIG. 6 is a side elevational view. The left side elevational view is the same as the right side elevational view.
The broken line showing in FIGS. 1 through 6 are for illustrative purposes only and forms no part of the claimed design.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Feb 17 1999 | 3M Innovative Properties Company | (assignment on the face of the patent) | / | |||
| Feb 17 1999 | CHEN, DANIEL T | Minesota Mining and Manufacturing Company | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 009782 | /0730 | |
| Mar 14 2001 | Minnesota Mining and Manufacturing Company | 3M Innovative Properties Company | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 011414 | /0768 |
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