{HEAD ~ A protected memory circuit} for {TAIL ~ use} with an electronic data system includes a memory element such as a shift register, and memory control or lock means to selectively control enablement of the memory element for read/write operations 
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{ HEAD ~ A protected memory circuit } for { TAIL ~ use } with an electronic data system includes a memory element such as a shift register , and memory control or lock means to selectively control enablement of the memory element for read / write operations
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