Will these work in an AT binding like the...
Will these work in an AT binding like the Marker Duke, too?
Nope, this is just for the NTN tele system -- the only ntn boots that will work with dynafit are the scarpas with the dynafit toe and heel.
I'm sure Gabe is right in regard to the "official" situation. However, I would be willing to bet that you could make them work, if you were so inclined.
The toe and heel profiles of an NTN boot are, AFAIK, identical to AT. The problem is that the boots flex at the bellows. Scarpa officially supports the Dynafit bindings, but they distribute spacers that fit under the bellows to stop the boot from flexing when used in AT mode. I'm sure you could probably create similar spacers of your own that would work with a Fritchi or Marker binding.
There are plenty of reports in the Telemarktips forums of people skiing Scarpa and Crispi NTN boots in (non-Dynafit) AT bindings. In fact, there's an answer by 'kerry' on the Backcountry.com Scarpa TX Pro page, stating that he's used them with Marker bindings.