Those look a little post 98 to me.Apologies for my ignorance,is narrow wide a 10/11 speed thing?
The shifting ramps are the machined cut-outs on the back of the 36t ring (2nd pic),some Shimano rings also have the shorter teeth in certain positions to coincide with the ramps to aid shifting.These teeth are all the same profile.

The 36t has 5 shift ramps (different style to those pictured) the others have none.Not sure if you're looking for something a little more modern than I have?