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The ornamental design for a collapsible headset, as shown. |
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FIG. 1 is a front elevational view of the collapsible headset of the present invention showing one side of the headset in collapsed condition and the other side extended;
FIG. 2 is an end elevational view thereof showing the extended end of the collapsible headset;
FIG. 3 is an end elevational view thereof taken from the collapsed end of the collapsible headset;
FIG. 4 is a top plan view thereof; and
FIG. 5 is a bottom plan view thereof.
Hofer, Alan, Frielingsdorf, Frank
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| May 30 1979 | Pickering & Company, Inc. | (assignment on the face of the patent) |
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