[n: Means Incorporated In The Disc, E.g. Hub, To Enable Its Guiding, Loading Or Driving (means For Driving The Head G9b/21.011; Guiding The Disc For Centering Or Locking G9b/17.003; Turntables Or Spindles For Driving G9b/19.028)] {g11b 23/00d1a2} Patents (Class G9B/23.005)