AIRPLANES
Unusual Designs from the 1920s, '30s, & '40s
Modern Mechanics & Inventions (May 1935)
Carl Strandgren: US Patent # 1639908 // USP # 1753252



Modern Mechanics & Inventions (May 1935)

Russell S. Powell: USP # 1,963,676


Modern Mechanics & Invention (October 1934)
F. K. Kirsten: USP # 2,090,052 // USP # 2,045,233
Modern Mechanics & Inventions (May 1935)
Alexander Chessin & Serge Trey: USP # 2,004,256
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