Upson Nut Co
Andrew Upson was the President of the Upson Nut Co which was established in 1872. The Standard Rule Co was the youngest firm in this group. Standard Rule’s factory was located in Unionville, Connecticut.
Within three years the Standard Rule co had become the fourth largest ruler manufacturer in the United States. It is not known if they began operation from scratch or by purchasing another rule manufacturer.
The Standard Rule Co. used the same nomenclature and rule numbering as Stanley.
By the turn of the century most small rule makers in the United States had either ceased