Something else to consider is that of those 'inventions' many of those were simply noticed by the patent holders and then registered at the patent office.

I have a high grade belgian 12 bore pinfire shotgun that is choke bored. I'm pretty sure it's date of manufacture pre-dates the patent on choke boring.

I've seen variations of the Lefaucheux action on pinfire doubles with double bite lumps from belgium and france...

I'm in support of the notion that one should buy the gun and not the name.

--Tinker