Antigravity Machine Patent Draws Physicists' Ire

A perpetual-motion machine may defy the laws of physics, but an Indiana inventor recently succeeded in having one patented.

On November 1 Boris Volfson of Huntington, Indiana, received U.S. Patent 6,960,975 for his design of an antigravity space vehicle.

Volfson's craft is theoretically powered by a superconductor shield that changes the space-time continuum in such a way that it defies gravity. The design effectively creates a perpetual-motion machine, which physicists consider an impossible device.

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