Wikipedia
Ivoprop
Ivoprop Corporation, founded in 1984 by Ivo Zdarsky, is an American manufacturer of composite propellers for homebuilt and ultralight aircraft, as well as airboats. The company headquarters is located in Bellflower, California.
Zdarsky started the company after carving his own propeller for a homebuilt ultralight trike that he flew from Cold War Czechoslovakia, over the Iron Curtain to Vienna in 1984. The company has sold over 20,000 propellers since then.
The company's propellers are built from carbon-fiber-reinforced polymer and feature a stainless steel leading edge.