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The ornamental design for a hearing aid, as shown. |
FIG. 1 is a perspective view of a hearing aid, showing my new design;
FIG. 2 is a right side elevational view thereof;
FIG. 3 is a left side elevational view thereof;
FIG. 4 is a front elevational view thereof;
FIG. 5 is a rear elevational view thereof;
FIG. 6 is a top plan view thereof; and
FIG. 7 is a bottom plan view thereof.
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Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Nov 27 1989 | U.S. Philips Corporation | (assignment on the face of the patent) | / | |||
Apr 06 1990 | VAN MOURIK, OKKE O | U S PHILIPS CORPORATION, A CORP OF DELAWARE | ASSIGNMENT OF ASSIGNORS INTEREST | 005285 | /0779 |
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