Design for a helicopter
US D153317 S
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Description (OCR text may contain errors)
April 5, 1949. p s c Des. 153,317
HELICOPTER Filed Jan. 8, 1948 2 Sheets-Shae}: 1
April 5,1949. F, N HA E K, Des. 153,317
HELICOPTER 2 Sheets-Sheet 2 Filed Jan. 8, 1948 Patented Apr. 5, 1949 Des. 153,317
DESIGN FOR A HELICOPTER Frank N. Piasecki, Lansdowne, Pa., assignor to The Piasecki Helicopter Corporation, Morton,
Application January 8, 1948, Serial No. 143,603
Term of patent 14 years To all whom it may concern:
Be it known that 1, Frank N. Piasecki, a citizen of the United States of America, residing at Lansdowne, in the county of Delaware and State of Pennsylvania, have invented a certain new, original, and ornamental Design for Helicopter, of which the following is a specification, reference being had to the accompanying drawing, forming part thereof.
Figure 1 is a front elevational view of my new design for a helicopter.
Figure 2 is a top plan view of the same.
Figure 3 is a side elevational View of the same.
Figure 4 is a perspective view taken from the front of the machine.
Figure 5 is a perspective view taken from the rear of the machine.
The characteristic features of my design reside in the portions shown in full lines.
I claim: The ornamental design for a helicopter, as shown and described.
FRANK N. PIASECKI.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date D. 139,021 Lewis Oct. 3, 1944 D. 144,401 Lewis Apr. 9, 1946 D. 146,984 Piasecki June 24, 1947