with means indicating prior or unauthorised use

Full Title

Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor > Record carriers > with means indicating prior or unauthorised use

Classification Context

Section:

PHYSICS

Class:

INFORMATION STORAGE

Subclass:

INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER