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The ornamental design for a dental chair back, as shown and described.
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FIG. 1 is a perspective view of a dental chair back incorporating the design of my new invention, with portions of the base and seat of a chair with which the back is associated shown for purposes of orientation in phantom outline;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a side view thereof, the other side being a mirror image thereof;
FIG. 4 is a back view thereof;
FIG. 5 is a top view thereof; and,
FIG. 6 is a bottom view thereof.
The features of the dental chair back shown in phantom lines are not claimed.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Mar 14 2005 | HOSEY, DAVID P | Midmark Corporation | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 016398 | /0370 | |
| Mar 16 2005 | Midmark Corporation | (assignment on the face of the patent) | / |
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