Disclosed is a knife 1, 1a with a handle 2 and a blade 3, preferably a reader or chopping knife, wherein in the blade 1, 1a, preferably in the handle 2, a transponder 4 with a transmitter - and receiving device and a data memory and a control unit is integrated. Such blades are suitable for use, for example, in the food industry, especially in the meat processing industry, for example, in slaughterhouses and disassembly driven, that, for example, meat from animals from bones to separate, but also for use in vegetables processing plants.
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