User:Kschlax
From Bill Goodwine's Wiki
The patent that I have chosen is one for a magentic levitation transportation system, commonly called a "MagLev". It patents the idea of suspending a vehicle above fixed tracks consisting of permanent magnets as well as ceramic magnets to control the attraction/repulsion, and therefore the height, of the vehicle with respect to the track.
Link:
Patent # 4,307,668 December 29, 1981 Roy D. Vinson http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.htm&r=347&f=G&l=50&d=PTXT&s1=maglev&p=7&OS=maglev&RS=maglev