There are a number of varieties of apples that have red flesh (or pink, even orange flesh) and some of them originated in Oregon. Airlie Red Flesh and Bill's Red Flesh are two that I can think of off hand.
We grow 31 red fleshed varieties in our orchard. The web address for our red fleshed apples is www.fourseasonscabinrental.com/redfleshedapples.html
There were two main people in developing red fleshed apples in the US. Albert Etter in California (Pink Pearl, Pink Pearmain and others) and Nels Hansen in North Dakota (?) who worked with Niedzweckyana.
Etter developed apples usually have regular green leaves, normal colored cambium and most of the apples are yellow or green skinned.
Hansen developed apples usually have reddish colored leaves, pinkish cambium and the apples are red to dark red skinned.
This is probably more than you wanted to know <grin>.