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			 The ornamental design for a base of a cleaning machine, as shown and described.                                                                  | 
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FIG. 1 is a front, perspective view of the base of a cleaning machine showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side-elevational view thereof, the right side-elevational view being a mirror image thereof;
FIG. 5 is a top plan view thereof; and,
FIG. 6 is a bottom plan view therof.
The broken line showing of the upper housing and handle of a cleaning machine in FIGS. 1-4 is for illustrative purposes only and forms no part of the claimed design.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc | 
| Aug 27 1996 | MEDEMA, DOUGLAS J | BISSELL INC | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 008235 | /0443 | |
| Aug 29 1996 | BISSELL Inc. | (assignment on the face of the patent) | / | |||
| May 10 1999 | BISSELL INC | BISSELL Homecare, Inc | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 009958 | /0984 | 
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