|Publication number||USD153315 S|
|Publication date||Apr 5, 1949|
|Filing date||Mar 13, 1947|
|Publication number||US D153315 S, US D153315S, US-S-D153315, USD153315 S, USD153315S|
|Inventors||Frank N. Piasecki|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (30)|
|External Links: USPTO, USPTO Assignment, Espacenet|
F. N. PIASECKI Des. 153,315
April 5, 1949.
HELICOPTER 3 Sheets-Sheet 1 Filed March 13, 1947 m m m m April 1949- F. N. PlASECKl Des. 153,315
HELICOPTER Filed March 13, 1947 3 Sheets-Sheet 2 IN V EN TOR.
Patented Apr. 5, 1949 Des. 153,315
DESIGN FOR A HELICOPTER Frank N. Piasecki, Lansdowne, Pa., assignor to Piasecki Helicopter Corporation Application March 13, 1947, Serial No. 137,602
Term of patent 14 years (01. Dll-l) To all whom it may concern:
Be it known that I, 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 elevation view of the 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
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