Category: Suppressed Inventions

• The Standard Oil and the Electric Car (Again)

  A postwar fuel-suppression theory claiming that a revolutionary high-mileage carburetor or fuel-vapor system appeared around 1947, could deliver roughly 100 miles per gallon or more, and was then buried by oil interests and intelligence services. In most versions, the inventor was bought off, threatened, disappeared, or died under suspicious circumstances, and the device was removed to protect petroleum markets and the internal-combustion status quo.

• The "Patent" Suppression

  This theory claimed that a revolutionary "fuel-less" engine had been invented in the late nineteenth century and then quietly purchased, hidden, or destroyed by entrenched coal and industrial interests. The most important historical anchor for this story type is the Keely motor controversy, in which John Ernst Worrell Keely claimed to harness a new motive force variously described as vaporic, etheric, or vibratory. The record shows intense public fascination, investment, technical secrecy, and later exposure, but no verified suppressed engine that operated without fuel in the ordinary sense.