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The ornamental design for a nasal mask, as shown and described.
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FIG. 1 is a front perspective view of a nasal mask showing our new design;
FIG. 2 is another perspective view thereof, taken from the rear;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a right side elevational view thereof, the left side elevational view being a similar thereto;
FIG. 5 is a rear elevational view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The portions drawn in broken lines are shown for illustrative purposes only and do not form part of the claimed design.
Kopacko, Ralph E., Paul, Zachary D., Miceli, Jr., Joseph M.
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Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Apr 10 2001 | Respironics, Inc. | (assignment on the face of the patent) | / | |||
Jun 27 2002 | Respironics, Inc | RIC Investments, Inc | DIVIDEND FROM SUBSIDIARY TO PARENT | 016741 | /0570 | |
Mar 17 2004 | RIC Investments, Inc | RIC Investments, LLC | CHANGE OF NAME SEE DOCUMENT FOR DETAILS | 016747 | /0177 |
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