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HELICOPTER BLADE WITH NON-HOMOGENEOUS STRUCTURAL SPAR
US 3,528,753 A
Filed
: 06/14/1968
Issued
: 09/15/1970
Est. Priority Date
: 06/14/1968
Status: Expired due to Term
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Current Assignee
Walter Gerstenberger
,
Walter J. Dutton
Original Assignee
Walter Gerstenberger
,
Walter J. Dutton
Inventors
Dutton, Walter J.
,
Gerstenberger, Walter
Application Number
US04/737,127
Time in Patent Office
823 Days
Field of Search
US Class Current
416/226
CPC Class Codes
B64C 2027/4736
from composite materials
B64C 27/473
Constructional features
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