dec 7, 1970 - AL1 Microprocessor
Description:
ALUFour-Phase Systems
"used to demonstrate a working computer in a dispute over an early patent for the microprocessor."
http://www.cpushack.com/2014/08/15/four-phase-systems-al1-processor-8-bits-by-lee-boysel/
Added to timeline:
Date:
dec 7, 1970
Now
~ 54 years ago