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The ornamental design for an audio amplifier, as shown. |
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FIG. 1 is a top plan view of an audio amplifier showing our new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a bottom plan view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a rear elevational view thereof;
FIG. 6 is a right side elevational view thereof; and
FIG. 7 is a front, top and left side perspective view thereof.
Nomura, Toshihito, Imai, Hirotaka
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Jul 07 1981 | NOMURA, TOSHIHITO | Pioneer Electronic Corporation | ASSIGNMENT OF ASSIGNORS INTEREST | 004153 | /0491 | |
| Jul 07 1981 | IMAI, HIROTAKA | Pioneer Electronic Corporation | ASSIGNMENT OF ASSIGNORS INTEREST | 004153 | /0491 | |
| Jul 08 1981 | Pioneer Electronic Corporation | (assignment on the face of the patent) | / |
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