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The ornamental design for a dental handpiece, as shown and described. |
FIG. 1 is a bottom plan view of a dental handpiece showing our new design;
FIG. 2 is a left side elevational view thereof;
FIG. 3 is a right side elevational view thereof;
FIG. 4 is a top plan view thereof; and
FIG. 5 is a front end elevational view thereof, the rear being plain and unornamental.
Straihammer, Reinhard, Schuss, Werner
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Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Nov 22 1989 | Siemens Aktiengesellschaft | (assignment on the face of the patent) | / | |||
Mar 12 1998 | Siemens Aktiengesellschaft | SIRONA DENTAL SYSTEMS GMBH & CO KG | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 009123 | /0177 | |
Mar 30 1998 | SIRONA DENTAL SYSTEMS GMBH & CO KG | Sirona Dental Systems GmbH | CONTRACT OF PURCHASE & SALE | 012110 | /0001 |
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