Winchester hasn't invented anything in a century. They merely exist as a marketing company, and as such their main job seems to be to make things cheaper and cheaper so that they can make more money.
To me their one strong suit was Olin and the ammo division. But even that's been on a downward spiral in recent years.
There are now two basic divisions of Winchester, as the Firearms Manufacturing Division (WRAC) was sold off to FN and is known as Winchester FN. The Munitions manufacturing division is still Winchester Olin. Olin sold off it's St. Marks, Florida Powder making facility to General Dynamics Corp, who in turn makes Winchester Powder for Hodgdon, to whom Olin assigned the rights of manufacture, market, and support. Note that Winchester Olin still manufatures primers, but probably also uses Brazilian Magtech Primers (speculation). Winchester Olin helped design and build a Primer Manufacturing Facility in Brazil for CBC.
Currently, Winchester Olin still manufactures their Premium Hunting and Defensive Lines if Ammunition in the USA.
Their bargain bin line, Winchester USA, may or may not be manufactured in the USA, and some of it has been made in Israel and elsewhere. Even if made in the USA, the Primers, Powder, Brass, and Bullets may have come from somewhere else-istan.
My last box of Winchester USA 9mm contained not only 9mm, but .380 and .32 ACP, as well. My last box of Winchester USA .45 ACP 230 grn FMJ was labeled Made in Israel.
Been buying Federal Champion 9mm for plinking ever since, when I'm not shooting my own reloads.