Leonard G. (Len) Johnson (born June 24, 1953) is an American inventor and entrepreneur who developed and patented a plan that may impact the world's petroleum economy and provide a solution to global energy demands.

In 2008, Johnson completed the United States' first pure biofuel transcontinental flight using bio-butanol in an experimental airplane he personally built.

Johnson's education was repeatedly disrupted when his father suffered two heart attacks, each of which caused him to leave college to run the family business.

When his father's business lost essential commercial frontage due to a highway project and was sold to an older brother, Johnson joined the U.S. Navy in April 1975.

20090090676 Over his desk, Johnson displays a placard with Charles F. Kettering's famous quote: "The Wright Brothers flew right through the smoke screen of impossibility."

As a small boy, Johnson listened to tower communications coming all the way from Lambert Airport in St. Louis on an old, upright cabinet radio next to the pot-bellied stove in Oberly’s General Store, a picturesque establishment owned and operated by an elderly couple who were long-time residents of Weldon Spring.

In both Arkansas and Tennessee, a partial engine tear down was performed to deal with a persistent cylinder heating problem and to prove that the fuel was not the culprit.

Johnson was presented with a replica of the Wright Brothers Memorial to commemorate his achievement in being the first to cross the continent using bio-butanol, and in proving that an environmentally sound alternative to 100LL existed.

Johnson recently appeared in an NBC Los Angeles channel 4 news segment with Vikki Vargas on stem cell research.