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The ornamental design for a base for office chair, as shown and described.
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FIG. 1 is a perspective view of a base for office chair 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;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
| Patent | Priority | Assignee | Title |
| D498092, | Nov 06 2002 | Chair legs | |
| D508806, | Sep 07 2004 | True Seating Concepts, LLC | Chair base |
| D525461, | May 06 2005 | True Seating Concepts, LLC | Chair base |
| Patent | Priority | Assignee | Title |
| 4763866, | Feb 19 1988 | Keystone Metal Products Company | Free standing base |
| D273350, | Nov 12 1981 | Simmons Universal Corporation | Arm chair |
| D473406, | May 20 2002 | Leg for chair |
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