Henderson is a defunct brand of U.S.-made motorcycle that went bust around the time of the Great Depression. In 1936 designer O. Ray Courtney took a 1930 Henderson and modified it into the streamlined style you see here:

[photo credit: knucklebusterinc.com]
Little is known about Courtney, though his name does pop up again in a 1953 Popular Science article, along with photos of another motorcycle he modded in 1950--with a style evolving along with the times:

The 1936 bike is now owned (and was restored) by one Frank Westfall of Syracuse, New York. The 1950 bike, sadly, is MIA.
via knucklebuster and finkbuilt
Comments
its very innovative...
Apparently Westfall owns both of them, but the second bike has not been restored yet. I have seen a picture of him riding it in a partially disassembled state. Still runs!
Ray Courtney was my grandfather; I remember seeing the bikes pictured above (from the Popular Science article) in his machine shop near Pontiac MI, when I was a child in the late 1960s. He worked for General Motors/Oldsmobile for many years and upon his death in 1984, we found old sketches of other ideas he had--including one for what would have been a jetski, had he followed through on it. Wonderful man and dearly missed.
Hey Courtney -
Thanks so much for the note! Drop us a line at blogs [at] core77.com -- maybe we can work together about publishing some of his sketches as a public archive of some of his other work.
thanks!