USD179661S - Helicopter - Google Patents

Helicopter Download PDF


Publication number
USD179661S US D179661 S USD179661 S US D179661S
United States
Prior art keywords
united states
elevational view
Prior art date
Application number
Paul M. Schroeder
Original Assignee
Bell Aircraft Corporation
Filing date
Publication date




Des. 179,661 Patented Feb. 5, 1957 United States Patent O we HELICOPTER Paul M. Schroeder, Jr., Fort Worth, Tex., assignor to Bell Aircraft Corporation, Wheatfield, N. Y.
Application December 2, 1955, Serial No. 39,130
Term of patent 14 years (Cl. D71--1) Fig. l is a side elevational view of a helicopter showing my new design;
Fig. 2 is a top plan view thereof;
Fig. 3 is a front elevational view thereof; and
Figs. 4, 5 and 6 are sectional outline views thereof taken about on lines IVVVI, respectively, of Fig. 1.
The side of the helicopter not shown in the drawings is identical in appearance with that illustrated in Pig. 1.
The essential features of my design reside in those shown in full lines.
I claim:
The ornamental design for a helicopter, as shown and described.
Des. 179,661
PAGE 2 References Cited in the file of this patent UNITED STATES PATENTS Alex Aug. 30, 1949 Alex Jan. 4, 1955 OTHER REFERENCES Washington Post & Times Herald, November 5, 1954, Navy Sea Dart Plane.



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