1954 Horton Wingless aircraft invented by William Horton of California. To secure funding for his project, Horton partnered with Howard Hughes. However, the partnership fell apart because Hughes wanted to take all the credit for the patents and production rights.
NASA inflatable wing technology demonstrator - video
NASA AD-1 oblique wing aircraft - photo
Eshelman Flying Flounder - photo and video
1918 Stout Batwing - photo
1931 Lanier XL-4 Vacuplane - photos
Narushevich Ring Wing - video