i can only give my Opinion but as a N.W Native i can tell ya for a fact all of these company's are in the N.W mostly around Portland ..
Benchmade ,Lone wolf,Gerber,Kershaw,Al Mar, Coast,Leatherman ,Columbia River Knife (CRK).. Sog is in Washington state ..im only talking about Production Factories here ..My Opinion is many "Maker's" from this area once worked in one of the "Factories" then went out on their own trying to make something " Better" that they could call their own .. Im Sure there are a Few like me who have Never worked at one of the Above places ,But Many Have ..Plus with all these "Factories" around Material's are easier to find . Again this is only My Opinion .:foot: