Why hasn't anyone thought of this before? - part II

In the category of "Why hasn't anyone thought of this before?", this week I give you: the transparent duct tape.

Why should you give your stuff that broken-like aspect with a coloured duct tape, when you can use this transparent duct tape that seamlessly re-attaches broken stuff? It's a mystery to me how these "oh, so simple" innovations keep showing up today when someone could already have thought of them years ago.