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The ornamental design for a helicopter, as shown. |
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FIG. 1 is a perspective view of a helicopter showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a left side elevational view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a rear elevational view thereof; and
FIG. 7 is a bottom plan view thereof.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Mar 12 1986 | WHYTE, ANDREW C | UNITED TECHNOLOGIES CORPORATION, A CORP OF DE | ASSIGNMENT OF ASSIGNORS INTEREST | 004572 | /0436 | |
| Mar 13 1986 | United Technologies Corporation | (assignment on the face of the patent) | / |
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