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The ornamental design for a helicopter, as shown and described. |
FIG. 1 is a perspective view of a helicopter showing the design;
FIG. 2 is a left side view thereof;
FIG. 3 is a right side view thereof;
FIG. 4 is a top view thereof;
FIG. 5 is a bottom view thereof;
FIG. 6 is a front view thereof; and,
FIG. 7 is a rear view thereof.
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Patent | Priority | Assignee | Title |
D264329, | Feb 02 1979 | Helicopter body | |
D271390, | Apr 28 1980 | NETHERWOOD, JOHN | Helicopter |
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