USD239930S - - Google Patents

Description

United States Patent {f g HELICOPTER Harold D. Ulisnik, Trumbull, Conn., assignor to United Technologies Corporation, Hartford, Conn.

Filed Dec. 18, 1974, Ser. No. 533,896

Term of patent 14 years Int. Cl. D12-07 US. Cl. BIZ-73 FIG. 1 is a perspective front view of my helicopter.

FIG. 2 is a side elevation view of my helicopter with the landing gear shown retracted.

FIG. 3 is a front view of my helicopter with the landing gear shown retracted.

FIG. 4 is a top view of my helicopter with the landing gear shown retracted.

I claim:

The ornamental design for a helicopter, substantially as shown and described.

Des. 239,930

Page 3 of 3 References Cited UNITED STATES PATENTS 3/1972 Ulisnik et a1. D12-73 7/ 1974 Leoni D1273 OTHER REFERENCES Interavia, April 1973, p. 286, Agusta A. 109C Hirundo helicopter at top of page.

Flight International, Jan. 3, 1973, p. 11, helicopter on page.

ALAN P. DOUGLAS, Primary Examiner

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