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			 The ornamental design for a swivel chair, as shown and described.  | 
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FIG. 1 is a front perspective view of the swivel chair, showing my new design;
FIG. 2 is a left side elevational view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a front elevational view thereof;
FIG. 6 is a rear elevational view thereof; and
FIG. 7 is a right side elevational view thereof.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc | 
| Apr 02 1987 | BUHK, RANDALL P | ALLSTEEL INC , A CORP OF IL | ASSIGNMENT OF ASSIGNORS INTEREST | 004700 | /0925 | |
| Apr 23 1987 | Allsteel Inc. | (assignment on the face of the patent) | / | 
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