| 
 | The ornamental design for an air purifier, as shown and described. | |||||||||||||||||
FIG. 1 is a perspective top view of an air purifier showing our new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a rear view thereof;
FIG. 7 is a bottom plan view thereof.
Wimsatt, James M., Lynch, Patrick E.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc | 
| Nov 12 1982 | LYNCH, PATRICK E | Pyramid Products, Inc | ASSIGNMENT OF ASSIGNORS INTEREST | 004105/ | 0737 | |
| Nov 12 1982 | WIMSATT, JAMES M | Pyramid Products, Inc | ASSIGNMENT OF ASSIGNORS INTEREST | 004105/ | 0737 | |
| Nov 29 1982 | Pyramid Products, Inc. | (assignment on the face of the patent) | / | |||
| Jan 09 1986 | PYRAMID PRODUCTS INCORPORATED | VAPORTEK, INC , A CORP OF WI | ASSIGNMENT OF ASSIGNORS INTEREST | 004514/ | 0361 | 
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