Oh boy....
Yes Fleetguard does have a combination full flow-by-pass filter. So do all the heavy duty filter manufacturers.
It is because the Cummins engine is designed for it internally.
Back in the 1980's Cummins went to 2 seperate spin on filters to get away from the big canister 750 by-pass filter that was the by-pass filter of choice ( and not a toilet paper media one by any stretch.) The part numbers were LF670 for the full flow and LF777 fo the spin on by-pass.
The engine desing allows the oil from the by-pass to go direct back to the oil pan.
Hence the term-----By-Pass.
The oil from a by-pass filter is not used to lubricate the engine. Which is why you do not want to take away any more than 10% of the oil flow when you have a by-pass.
Cummins in the mid 90's went to a one filter design of a combination full flow and by-pass filter. Part number LF3000. They also offer this, as different part numbers, for non Cummins engines.
So this would not be a "new" design fo automotive filters.
By-pass filters work best with low flows. Higher flows will not get you the beta ratios that show you effectively trap smaller particles.
If someone had a picture of his design, we could tell if in fact his filter has the design to be a by-pass style and full flow.
As for 2 micron particles being trapped by his design..why even a Fram does that..
There are many medias that will do that on the market. But as with Red Bowties situation, you do not want to starve the engine of oil. Which is why you don't want to allow much flow through the by-pass so that the full flow section of the filter allows enough oil downstream to lubricate the engine and not cause any problems.