Maglev is magnetic levitation technology.
See link below for the invalidation of trade mark registration for generic word "Maglev". The applicant sought to invalidate the mark "Maglev" on the grounds that it's a generic word used in the trade to refer to magnetic levitation technology. The term "Maglev" is listed in the 1988 New Oxford Dictionary as a noun which means, "a transport system in which trains glide above a track, supported by magnetic repulsion and propelled by a linear motion", originating from the late 20th century from the words "magnetic levitation" . It was also noted that there have been international conferences on maglev technology since 1972.
Source:
http://www.mondaq.com/x/51518/Trademark/Trade Mark Registrat...