Invention vs. Innovation vs. Copy

in·ven·tion
Pronunciation: \in-ˈven(t)-shən\
Function: noun
Date: 14th century
1: discovery, finding
2: productive imagination : inventiveness
3 a: something invented: as (1): a product of the imagination; especially : a false conception (2): a device, contrivance, or process originated after study and experiment b: a short keyboard composition featuring two- or three-part counterpoint
4: the act or process of inventing

in·no·va·tion
Pronunciation: \ˌi-nə-ˈvā-shən\
Function: noun
Date: 15th century
1 : the introduction of something new
2 : a new idea, method, or device : novelty

copy
Pronunciation: \ˈkä-pē\
Function: noun
Inflected Form(s): plural cop·ies
Etymology: Middle English copie, from Anglo-French, from Medieval Latin copia, from Latin, abundance — more at copious
Date: 14th century
1: an imitation, transcript, or reproduction of an original work (as a letter, a painting, a table, or a dress)
2: one of a series of especially mechanical reproductions of an original impression; also : an individual example of such a reproduction
3archaic : something to be imitated : model
4 a: matter to be set especially for printing b: something considered printable or newsworthy —used without an article c: text especially of an advertisement
5: duplicate 1a

Once people invented something new, surely people might imitating the original for use. Other people also started the innovating or copying with acknowledging the inventor.

What category(ies) are you in?

Reference: Merriam- Webster Online