I haven't studied the point but it would seem Chimps et.al. are innovators rather than inventors. Using current material to resolve problems seems "innovative" as Carol's using an existing implement for an entirely new purpose, or purposes. Perhaps creativity is the harbinger of invention, and need is the mother of innovation. Talent is necessary as well.

If I say I can take a few dollars of linen, wood and pigment and create a "moving" image worth thousands to others, that is a talent and creation is a process. Others write books or poetry; an engineer fabricates or a violinist hears notes without frets. This is Creation. Each of us, like our forebears, innovate every day.