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The ornamental design for a helicopter, as shown and described. |
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FIG. 1 is a left side elevational view of a helicopter showing my new design;
FIG. 2 is a right side elevational view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a top plan view thereof; and,
FIG. 6 is a bottom plan view thereof.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Aug 07 1991 | SHALLENE, FRANK M | BELL HELICOPTER TEXTRON INC A CORPORATION OF DE | ASSIGNMENT OF ASSIGNORS INTEREST | 005801 | /0624 | |
| Aug 09 1991 | Bell Helicopter Textron Inc. | (assignment on the face of the patent) | / | |||
| Apr 01 2001 | BELL HELLCOPTER MICHIGAN, INC | TEXTRON IPMP L P | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 016283 | /0404 | |
| Apr 01 2001 | BELL HELICOPTER TEXTRON, INC | BELL HELICOPTER MICHIGAN, INC | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 016283 | /0439 |
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