US D153316 S
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April 5, 194-9. F. N. PIASECKI 153,316
HELICOPTER 7 Filed March 15, 1947 3 Sheets-Shet 1 IN VEN TOR.
April 5, 1949. F. N. PlAsECKl Des. 153,316
HELICOPTER Filed March 13, 1947 5 Sheets-Sheet 2 IN V EN TOR.
April 1949- F. N. PIASECKI Des. 153,3l6
HELICOPTER Filed March 15, 1947 3 Shets-Sheet 5 Patented Apr. 5, 1949 UNITED Des. 153,316
STATES PATENT OFFICE' DESIGN FOR A HELICOPTER Frank N. Piasecki, Lansdowne, Pa., assignor to Piasecki Helicopter Corporation 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 new, original, and ornamental Design for a Helicopter, reference being had to the accompanying drawings, forming a part thereof, of which the following is a specification.
Figure 1 is the side elevational view of a helicopter, showing my new design as it would appear on the ground.
Figure 2 is a front elevational view of th same.
Figure 3 is a top plan view of the same.
Figure 4 is a perspective view of the same.
Figure 5 is a rear elevational view of the same. I claim: The ornamental design for a helicopter, as shown.
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