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			 The ornamental design for a housing for a reverse osmosis water purification unit, substantially as shown and described.  | 
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FIG. 1 is a perspective view of a housing for a reverse osmosis water purification unit showing my new design;
FIG. 2 is a front elevational view thereof, the rear view being identical thereto;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a left side elevational view thereof; and
FIG. 6 is a right side elevational view thereof.
| Patent | Priority | Assignee | Title | 
| 5078876, | Jan 17 1990 | ENRICH CORPORATION, THE | Apparatus for multistage purification of water | 
| D306339, | Jul 30 1987 | Reverse osmosis water purification unit | |
| D318092, | Feb 20 1990 | Water filter or similar article | |
| D318093, | Feb 20 1990 | Water filter or similar article | |
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| ER3306, | 
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc | 
| Sep 11 1985 | CLARK, GEORGE B | DOW CHEMICAL COMPANY, THE | ASSIGNMENT OF ASSIGNORS INTEREST | 004835 | /0853 | |
| Sep 16 1985 | The Dow Chemical Company | (assignment on the face of the patent) | / | 
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