[n: Recording By Means Directly Associated With The Tip Of A Microscopic Electrical Probe As Used In Scanning Tunneling (stm) Or Atomic Force Microscopy (afm) For Inducing Physical Or Electrical Perturbations In A Recording Medium, The Permanent Effect Of Which Being The Writing Of At Least One Information Unit Of A Sequence Disposed Along A Track; Reproducing Such Memorised Information By Such Association Of Tip And Means; Record Carriers Or Media Specially Adapted For Such Transducing Of Information (marking Using Electrical Current B41m5/20; Investigating Materials By Using Tunnel Effect G01n27/00f; Measuring Irregularity Of Surfaces By Using Scanning Force Microscopes G01b7/34a)] {g11b 9/00a} Patents (Class G9B/9.001)