Patent ID: 6915398

Claim:
A data reproduction system reading out, using a data reader, data recorded in a recording medium using a data recorder, said data recorder comprising: a storage circuit storing data, a detection circuit detecting a date, a set circuit setting a time limit allowing output of said data using said data reader, and a record circuit connected to said storage circuit, said detection circuit and said set circuit to record the data stored in said storage circuit, the time limit set by said set circuit, and a recorded date of recording said data and said time limit detected by said detection circuit into said recording medium, said data reader comprising: a detection circuit detecting a date, a read circuit reading out said time limit and said recorded date from said recording medium, a determination circuit connected to said detection circuit and said read circuit of said data reader to determine whether output of said data recorded in said recording medium is allowed or not based on said time limit and said recorded date read out by said read circuit and a current date detected by said detection circuit, an output circuit connected to said determination circuit to read out said data from said recording medium for output when output of said data is allowed, and an overwrite circuit connected to the detection circuit of said data reader to overwrite the recorded date recorded in said recording medium with the current date detected by said detection circuit.