Lol, as for the anti-grav machine, i dont believe it, i believe we will one day create artifitial gravity in space (without the aid of centrifugal force) but as for anit-grav, impossible.

Something you may find intresting tho, you can create a perpetual motion device quite easily by spining an object in a zero gravity vacume at a temp of -283 degrese C with no light touching it , (an enviroment such as space).
MullManiac Reviewed by MullManiac on . Anti-gravity ship on it's way! Patent issued for anti-gravity device WASHINGTON, Nov. 9 (UPI) -- The U.S. patent office has reportedly granted a patent for an anti-gravity device -- breaking its rule to reject inventions that defy the laws of physics. Related Headlines Space travel may suppress immune system (October 17, 2005) -- San Francisco scientists say they've determined why astronauts become sick so easily: weightlessness in space prevents some immunity genes from ... > full story Genes found that don't Rating: 5