As said above, the rattler type of grind, which was once very popular, was done with the wheel on its side. The thinness of the blade meant that the shaving angle would be all wrong, so the spine was left at its original thickness to keep the right angle. Looking at the blade tip-on, it resembles a 'T' - no matter how wide the wheel, you couldn't use it in its usual orientation and still leave the thicker metal all along the spine, so it is a combination of grinds and is not referred to or thought of a true wedge.
The blades of some framebacks were ground in a similar way - some, particularly the french ones, make little effort to remove the grinding lines which run in the same orientation as the spine, often giving the blade a kind of tree bark-like effect - something you see in late, casually made examples of Filarmonicas when the company was winding down (I mean the coarse grinding marks, not any tendency to wedginess).
You find this very thin wedge shaped blade on most of the framebacks and faux framebacks, whether they use a tube to go over the blade to give a thicker spine to get the right honing angle or if the thicker spine casing grips the blade, both in replaceable blade and fixed blade models.
One other example was made by the famous firm Tuckmar and was called the 'Tuckmar T' because it was made in the rattler style - a comparatively modern rattler, that is!
None of the above can be considered as true wedges because there is not enough 'meat' in the blade to give the right honing angle, so other artifices must be resorted to such as combination grinding, sleeves and frames, so even though the blade is really a true wedge it does not count as such.
There is a halfway-house that most of us have come across - the microtome razor. This is a true wedge on one side and a shallow hollow grind on the other. Again, it does not count as a true wedge.
Regards,
Neil