To make matters worse, the day after Faggin started work at Intel, Shima arrived from Japan to check the non-existent chip design of the 4004. Busicom was understandably upset but Faggin came up ...

The Intel 4004 was among the first microprocessors and ... With the schematic straight from [Federico Faggin], software analysis tools from [Lajos Kintli] and [Klaus Scheffler] to actually build ...

and engineer Frederico Faggin set about building the design into a workable product. But BUSICOM started to get impatient -- the ideas were risky and development was taking too long. But Intel ...