Boeing noise-shielding wing configuration patents.
"Boeing Gets Patents to Develop Quiet Technology" by Jason Paurfrom Wired magazine Autotopia blog.
http://www.wired.com/autopia/2011/03/boeing-granted-patents-on-quiet-technology/
"Boeing Gets Patents to Develop Quiet Technology" by Jason Paurfrom Wired magazine Autotopia blog.
http://www.wired.com/autopia/2011/03/boeing-granted-patents-on-quiet-technology/