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The ornamental design for a portion of a chair back, as shown and described.
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FIG. 1 is an isometric view of a portion of a chair back showing my new design.
FIG. 2 is a front view thereof.
FIG. 3 is a top view thereof.
FIG. 4 is a bottom view thereof.
FIG. 5 is a right side view thereof; and,
FIG. 6 is a left side view thereof.
The broken lines shown in FIGS. 1-6 are included for the purpose of illustrating environmental elements only and form no part of the claimed design. The dotted line shown in FIGS. 1-3 and 5-6 represents an unclaimed border between claimed and unclaimed subject matter forms no part of the claimed design. The rear view is omitted and forms no part of the claimed design.
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| 7234773, | Jun 14 2004 | HNI TECHNOLOGIES INC | Backrest for a chair, with a retractor |
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| D844358, | Jun 13 2016 | MILLERKNOLL, INC | Chair and chair components |
| D845050, | Jun 13 2016 | MILLERKNOLL, INC | Chair and chair components |
| D845692, | Jun 13 2016 | MILLERKNOLL, INC | Chair and chair components |
| D882317, | Jun 13 2016 | MILLERKNOLL, INC | Chair |
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Apr 23 2004 | RAFTERY, WILLIAM B | HON TECHNOLOGY INC | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 015319 | /0500 | |
| Apr 27 2004 | HNI Technologies Inc. | (assignment on the face of the patent) | / | |||
| May 11 2004 | HON TECHNOLOGY INC | HNI TECHNOLOGIES INC | CHANGE OF NAME SEE DOCUMENT FOR DETAILS | 015589 | /0109 |
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