G11B3/5818 - CPC Classification

Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor; Cleaning record carriers or styli, e.g. removing shavings or dust or electrostatic charges during transducing operation for record carriers

• G11B3/5827 » {using means contacting the record carrier} 0
• G11B3/5854 » {using means not contacting the record carrier} 0