Multi-touch
I think is very safe to say multi-touch as a both a concept and term have been in use long before iPhone. I remember watching a cool video by Xerox Parc of a multi-touch display surface that was done in the 90's (but I can't find the link anymore). For an interesting history on touch/multi-touch, check this interesting article by Bill Buxton: http://www.billbuxton.com/multitouchOverview.html
While I agree that "Multi-Touch" shouldn't be trademarkable, they cited the broad scope of use as a reason why. Was the term in broad use before the iPhone came around? I don't recall.
I think is very safe to say multi-touch as a both a concept and term have been in use long before iPhone. I remember watching a cool video by Xerox Parc of a multi-touch display surface that was done in the 90's (but I can't find the link anymore). For an interesting history on touch/multi-touch, check this interesting article by Bill Buxton: http://www.billbuxton.com/multitouchOverview.html