I don't recognize the one in the top photo, top right. Otherwise looks like a a couple Arrow Harts & A Hubbell from the 20's-50's and a GE from someplace in the 70 or 80's Bottom photo left to right looks like a mid 1990's common Leviton, then a Bryant (or Smith/Stone, assuming these are Canadian) hospital grade, I don't recognize the next one and on the far right, I'd say undeniably GE, but not like one I've seen in the states
photos of the back sides would add to the thread as well
Ok A little more info: Picture 1: Top-left is labeled AH+H, top-center is Hubbell, top-right is smith+stone Bottom-left is smith+stone (seems very common here), bottom-right, another smith+stone.
Picture 2 Second is a smith+stone, rather common around here. the third is a smith+stone, push+pray, I never seen these before. 4th one is a GE. No idea on the years of any of the devices other than what's mentioned in this thread