Probably been covered but, is there any benefit at all into researching "Using flame glove".. Using Dragon staff" "Using Storm rose".. "Using"..etc..etc..
No completed research documentation ever pops for these (Ufopedia) when the research is done.
Well, yes. You can't use those items (except throw them around or some such) unless you research the "using" topic.
Of course, it's a bit illogical. You can spend quite a bit of research and figure out what the item does. Then you can decide whether you want to research it further. But it would be more logical to figure out how to use the item also in the first bit of research. If you didn't know how to use it, you shouldn't learn much of what it does either. That is, you shouldn't be able to find out what those magical items can do unless you at the same time figure out how you use them.