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Louis Breguet Helicopter Wing System Patent Lithograph and Specification Document

Currency:USD Category:Collectibles / Autographs Start Price:NA Estimated At:600.00 - 800.00 USD
Louis Breguet Helicopter Wing System Patent Lithograph and Specification Document

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Auction Date:2020 Jul 16 @ 18:00 (UTC-05:00 : EST/CDT)
Location:15th Floor WeWork, Boston, Massachusetts, 02108, United States
ALS - Autograph Letter Signed
ANS - Autograph Note Signed
AQS - Autograph Quotation Signed
AMQS - Autograph Musical Quotation Signed
DS - Document Signed
FDC - First Day Cover
Inscribed - “Personalized”
ISP - Inscribed Signed Photograph
LS - Letter Signed
SP - Signed Photograph
TLS - Typed Letter Signed
Original patent lithographs for Louis Breguet's improvements in an aircraft's rotating wing system, five pages, four 12.5 x 10.25 (linen-backed) and one 7 x 10.25 (not linen-backed), June 2, 1932. The diagrams feature multiple, highly detailed views of the improved rotary wing design. The top borders read: "373,771 Complete Specification." The lower borders feature the printed text: "Charles & Read Ltd. Photo Litho." The left borders read: "This Drawing is a reproduction of the Original on a reduced scale." Includes the printed British "Patent Specification" document, five pages on six sheets, which describes the invention as "improvements in the method and device for stabilizing, controlling and propelling flying machines having revolving supporting surfaces." The specification sheet bears a "U.S. Patent Office Library" ink stamp on the first page. In fine condition.