Not to sound brash but look at Spyderco...they sell well and don't market their heat treatment.If someone called(in the pre-internet days) we'd gladly tell the rc hardness.Camillus on the other hand as a bit pricier brand under Imperial Schrade did mention the rc hardness in the knife care information on their boxed knives.What you call an excellent heat treatment I call 'the norm'
Last I recall it was Buck that came to US to make slipjoint knives for them.For a company at the time with a 'special' heat treatment (not marketed at the time) they sure didn't mind ours either.