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Method and apparatus for storing and reading data

  • US 6,056,199 A
  • Filed: 04/20/1998
  • Issued: 05/02/2000
  • Est. Priority Date: 09/25/1995
  • Status: Expired due to Term
First Claim
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1. A system for storing and retrieving data, the system comprising:

  • a memory device including a memory, a detector and an emitter coupled to the memory, and a symbol carried on the memory device, at least a portion of the symbol encoding a key for accessing the memory of the memory device; and

    a reader, the reader having a reading portion for reading the symbol, a transmitter for transmitting an interrogation signal to the detector of the memory device based on the key, and a receiver for receiving a data signal from the emitter of the memory device.

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