I was wondering the difference between 'invention' and 'innovation'
Do they have the same meaning?
Probably every invention has to have an element of innovation; but not every innovation is an invention.
It seems to me that an "invention" solves a problem and is new; but an innovation is simply new.
Also, we usually apply "innovation" to something we approve of, or something that is surprising (i.e. it tends to have positive connotations); whereas "invention" does not necessarily carry any such connotations.
(In the above, by the way, I've assumed that you're interested in the countable uses of the words – "an invention", "an innovation" – as opposed to the abstract, non-countable uses. )
All the best,