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The ornamental design for a dual-tone multi-frequency microphone, as shown and described. |
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FIG. 1 is a front, top, and right side perspective view showing our new design for a dual-tone multi-frequency microphone;
FIG. 2 is a left side elevational view thereof;
FIG. 3 is a rear elevational view thereof; and,
FIG. 4 is a bottom plan view thereof.
The broken lines in FIGS. 2-4 are for illustrative purposes only and form no part of the claimed design.
Lindeman, Phillip E., St. Pierre, John F.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| May 16 1995 | LINDEMAN, PHILLIP E | Motorola, Inc | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 007517 | /0027 | |
| May 25 1995 | Motorola, Inc. | (assignment on the face of the patent) | / | |||
| May 25 1995 | ST PIERRE, JOHN F | Motorola, Inc | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 007517 | /0027 |
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