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The ornamental design for an optical viewfinder, as shown. |
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FIG. 1 is a perspective view of an optical viewfinder showing my new design;
FIG. 2 is a side elevational view thereof;
FIG. 3 is a front elevational view thereof; and
FIG. 4 is a rear elevational view.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Feb 01 1978 | Alan Gordon Enterprises, Inc. | (assignment on the face of the patent) | / |
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