Actually, what the article clearly states regarding 1921 is that he "was a seller of timber and rough-cut lumber" ... _nowhere_ does it state that he built any machines in 1921.
How clever these marketeers. After all, marketing works best on the gullible, and what's a little "truth stretching" among friends, eh? ;)
It's why a gullible public continues to fall for, and buy products like hamburgers, that bear no resemblance whatsoever to the pictures and gimmicks that advertise them.
FACT: "Powermatic" was founded in 1928 ... its "90th Anniversary" as Powermatic will not be until 2018.
You do the math. End of story ...