Historical Document · 1976
US Patent 3,979,058: Operator Prompting System for Stored Program Calculator (Specialized Electronics Corp.)
Prompting the operator for each input in words or lit legends; filed 17 March 1975, granted 7 September 1976.
Historical Document · 1976
Prompting the operator for each input in words or lit legends; filed 17 March 1975, granted 7 September 1976.